Hajj in Quran

“Our Lord! And make us submissive unto You and of our offspring a nation submissive unto You, and show us our Manasik (all the ceremonies of pilgrimage - Hajj and Umrah, etc.), and accept our repentance. Truly, You are the One Who accepts repentance, the Most Merciful.” (Quran: 2/128)

Verily! As-Safa and Al-Marwah (two mountains in Makkah) are of the Symbols of Allah. So it is not a sin on him who performs Hajj or Umrah (pilgrimage) of the House (the Kabah at Makkah) to perform the going (Tawaf) between them (As-Safa and Al-Marwah). And whoever does good voluntarily, then verily, Allah is All-Recognizer, All-Knower. (Quran: 2/158)
And perform properly (i.e. all the ceremonies according to the ways of Prophet Muhammad (p.b.u.h.)), the Hajj and Umrah (i.e. the pilgrimage to Makkah) for Allah. (Quran: 2/196)
The Hajj (pilgrimage) is (in) the well-known (lunar year) months (i.e. the 10th month, the 11th month and the first ten days of the 12th month of the Islamic calendar, i.e. two months and ten days). So, whosoever intends to perform Hajj therein (by assuming Ihram), then he should not have sexual relations (with his wife), nor commit sin, nor dispute unjustly during the Hajj. And whatever good you do, (be sure) Allah knows it. And take a provision (with you) for the journey, but the best provision is At-Taqwa (piety, righteousness, etc.). So fear Me, O men of understanding! (Quran: 2/197)
There is no sin on you if you seek the Bounty of your Lord (during pilgrimage by trading, etc.). Then when you leave Arafat, remember Allah (by glorifying His Praises, i.e. prayers and invocations, etc.) at the Mashar-il-Haram. And remember Him (by invoking Allah for all good, etc.) as He has guided you, and verily, you were, before, of those who were astray. (Quran: 2/198)
And Hajj (pilgrimage to Makkah) to the House (Kabah) is a duty that mankind owes to Allah, those who can afford the expenses (for ones conveyance, provision and residence); and whoever disbelieves (i.e. denies Hajj (pilgrimage to Makkah), then he is a disbeliever of Allah), then Allah stands not in need of any of the Alameen (mankind and Jinns). (Quran: 3/97)
O you who believe! Kill not game while you are in a state of Ihram for Hajj or Umrah (pilgrimage), and whosoever of you kills it intentionally, the penalty is an offering, brought to the Kabah, of an eatable animal (i.e. sheep, goat, cow, etc.) equivalent to the one he killed, as adjudged by two just men among you; or, for expiation, he should feed poor persons, or its equivalent in fasting, that he may taste the heaviness (punishment) of his deed. Allah has forgiven what is past, but whosoever commits it again, Allah will take retribution from him. And Allah is All-Mighty, All-Able of Retribution. (Quran: 5/95)
Lawful to you is (the pursuit of) water game and its use for food - for the benefit of yourselves and those who travel, but forbidden is (the pursuit of) land game as long as you are in a state of Ihram (for Hajj or Umrah). And fear Allah to Whom you shall be gathered back. (Quran: 5/96)
Allah has made the Kabah, the Sacred House, an asylum of security and Hajj and Umrah (pilgrimage) for mankind, and also the Sacred Month and the animals of offerings and the garlanded (people or animals, etc. marked with the garlands on their necks made from the outer part of the stem of the Makkah trees for their security), that you may know that Allah has knowledge of all that is in the heavens and all that is in the earth, and that Allah is the All-Knower of each and everything. (Quran: 5/97)
And proclaim to mankind the Hajj (pilgrimage). They will come to you on foot and on every lean camel; they will come from every deep and distant (wide) mountain highway (to perform Hajj). (Quran: 22/27)
Allah Azza wa Jall mentioned the sacrifice together with the first and foremost worship in Islam: prayer. This is a clear indication of its great importance. Thus, He ordered His Messenger (p.b.u.h.) to slaughter sacrifices by saying: <<…Pray unto your Lord and slaughter (your sacrifice)…" (Quran: 109/2) Hajj in Sunnah Narrated Ibn Umar: Allah's Apostle said: “Islam is based on (the following) five (principles): 1. To testify that none has the right to be worshipped but Allah and Muhammad is Allah's Apostle. 2. To offer the (compulsory congregational) prayers dutifully and perfectly. 3. To pay Zakat (i.e. obligatory charity). 4. To perform Hajj. (i.e. Pilgrimage to Mecca) 5. To observe fast during the month of Ramadan.” (Bukhari: Book 2, Hadith 7) “Sound Hajj has no reward except Paradise” (Bukhari & Muslim) Narrated Ibn Umar: A man asked the Prophet: "What (kinds of clothes) should a Muhrim (a Muslim intending to perform Umrah or Hajj) wear? He replied, ‘He should not wear a shirt, a turban, trousers, a head cloak or garment scented with saffron or Wars (kinds of perfumes). And if he has n slippers, then he can use Khuffs (leather socks) but the socks should be cut short so as to make the ankles bare.’” (Bukhari: Hadith 615, Vol. 2). (Bukhari: Book 3, Hadith 136) Allah's Messenger (p.b.u.h.) said, "He who is not prevented from performing the pilgrimage by an obvious necessity, a tyrannical ruler, or a disease which confines him at home, and dies without having performed the pilgrimage, may die if he wishes as a Jew, or if he wishes as a Christian." (Tirmidhi: 2535, Narrated Abu Umamah) (Darimi transmitted it) "The best days in the world are the Ten days." (The First Ten Days of Dhul-Hijjah) (Ibn Hibban, al-Bazzaar, authenticated in Sahih Jaami us-Sagheer 1133) "There are no days during which good deeds are more beloved by Allah than these (ten) days." (Bukhari, Tirmidhee and others) "The day of al-Fitr (i.e. Eid ul-Fitr), the day of an-Nahr, and the days of Tashriq are Eid days for us Muslims. They are days of eating and drinking." (Ahmad, Nasa’i, Sahih ul-Jaami 8192) Amr Ibn Al-Aas narrates, “When Islam entered my heart, I went to the Messenger of Allah and said: ‘Give me your hand so that I may pledge allegiance to you.’ The Prophet spread his hand, but I withdrew mine. He said, ‘What is wrong Amr?’ I said, ‘I want to make a condition.’ ‘And what is that?’ he said. I said, ‘That Allah will forgive me.’ Then the Messenger of Allah said, ‘Did you not know that Islam wipes out what came before it, and that Hijrah wipes out what came before it and that Hajj wipes out what came before it!’” (Muslim: 121) Abu Hurairah narrates: “I heard the Prophet say, ‘Whoever performs Hajj and does not commit any Rafath (obscenity) or Fusooq (transgression), he returns (free from sin) as the day his mother bore him’”. (Bukhari) Aisha (May Allah be pleased with her) asked the Prophet (p.b.u.h.), “We find that Jihad is the best deed, shouldn’t we (women) do jihad?” The Prophet replied, ‘Rather the best Jihad is a Hajj Mabroor!’ Aisha later said, ‘I’ll never cease performing Hajj after I heard that from Rasul Allah’”. (Bukhari and Muslim) The Prophet (p.b.u.h.) said, “There is no day on which Allah frees more of His slaves from Fire than the Day of Arafat, and He verily draws near, then boasts of them before the angles, saying: ‘What do they seek?’” (Sahih Muslim) And in another Hadith: “Verily Allah boasts of the people of Arafat before the people of Heaven (angels) saying: ‘Look to my servants who have come to Me disheveled and dusty.’” Standing at Arafat is one of the greatest pillars of Hajj as stated by the prophet (p.b.u.h.), He said, "Hajj is Arafat." (Ahmad) Abu Hurayrah (may Allah be pleased with him) said: “I heard the Prophet (p.b.u.h.) say: ‘Whoever does Hajj for the sake of Allah and does not have sexual relations (with his wife), commit sin, or dispute unjustly (during the Hajj), will come back like the day his mother gave birth to him.’” (Bukhaari: 1449, Muslim: 1350) Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (p.b.u.h) said: “Umrah is an expiation for the time between it and the previous Umrah, and an accepted Hajj has no less a reward than Paradise.” (Bukhaari: 1683, Muslim 1349) Abdullah Ibn Mas’ood said: “the Messenger of Allah (p.b.u.h) said: ‘Keep on doing Hajj and Umrah, for they eliminate poverty and sin just as the bellows eliminate impurities from iron and gold and silver.’” (Tirmidhi: 810, Nasa’i: 2631) Ibn Umar reported that the Prophet (p.b.u.h.) said: “The one who fights for the sake of Allah and the pilgrim who goes for Hajj or Umrah are all guests of Allah. He called them and they responded; they ask of Him and He will give them.” (Ibn Majah: 2893)