Hajj is a yearly event and gathering of people at the first house (the kaaba) to remember the sacrifice of Abraham.
3:96 The first House (Bayt) placed for the people is the one in Bakk’a, blessed, and a guidance for the worlds.
3:97 In it are clear signs: place (Maqamu) of Abraham And whoever enters it will be secure. And God is owed from the people Pilgrimage (Hajj) at the House (Al Bayti), whoever can make a path to it. And whoever rejects, then indeed, God is rich from need of the people.
There is no blame on people to walk around the Saffa and the Marwa which are symbols of God.
2:158 Indeed, the Safaa and the Marwa are among the Symbols (Shaairi) of God. So whoever (participate in) Pilgrimage (Hajja) at the House, or is merely visiting, then there is no blame upon him if he walk around them (Yatawafa). And whoever donates for goodness, then God is Thankful, Knowledgeable.
Shaving heads is prohibited until the animal sacrifice reaches the destination the kaaba.
2:196 “And conclude the Pilgrimage (Hajj) and the visit (Umrah) for God. But, if you are prevented, then provide what animal offering (Hadyi) is affordable; and do not shave your heads until the animal offering (Hadyu) reaches its destination (Kaaba). Whoever of you is ill or has an ailment to his head, then he may redeem by fasting or by giving a charity or by performing duty….”
If anyone is unable to afford the animal offering then he/she must fast for three days during the hajj and seven when he returns home.
2:196 “….But if you are secure, then whoever makes the visit (Umrah), but decides to continue until the Pilgrimage (Hajj), then he shall provide what animal offering (Hadyi) is affordable; but for he who cannot find anything, then he must fast for three days during the Pilgrimage (Hajj) and seven when he returns (to home); this will make a complete ten – this is for those whose family is not resident at the Restricted Mosque (Masjid Al Haram). And be aware of God, and know that God is severe in retribution.”
Full moons of hajj are made known to people. Therefore people are allowed to perform hajj in these full moons time period.
2:197 The Pilgrimage (Hajj) Full moons are made known. So whoever decides to perform the Pilgrimage (Hajj) therein, then there shall be no sexual approach, nor wickedness, nor baseless argument in the Pilgrimage (Hajj). And any good that you do, God is aware of it; and bring provisions for yourselves, though the best provision is righteousness; and be aware of Me O you who possess intelligence.
After dispersing from the elevated place (the Arafat), people are to remember God at Restricted LandMark (Al Mash’ar ul Haram).
2:198 There is no sin upon you to seek goodness from your Lord. So when you disperse from the elevated place (Arafat), then remember God at the Restricted LandMark (Al Mash’ar ul Haram), and remember Him as He has guided you; for you were straying before that.
2:199 Then you shall disperse from where the people dispersed, and seek the forgiveness of God; God is surely Forgiving, Merciful.
2:200 When you have completed your duties, then remember God as you remember your fathers or even greater. From among the people is he who says: “Our Lord, give us from this world!” But in the Hereafter he has no part.
God appointed the location of the house (The Kaaba).
22:26 And We have appointed to Abraham the location of the House: “Do not set up anyone with Me, and purify My House for those who walk around (Tawaf), and those who stay, and those who take heed (Rukai), the surrenders (Sujjudi).”
Prophet Muhammad was ordered to call the people for the Hajj.
22:27 And call out to the people with the Pilgrimage (Hajj), they will come to you walking and on every camel, they will come from every deep (Amiqin) ravine (Fajjin).
God says mention name of God while sacrificing an animal during hajj in the appointed days.
22:28 So that they may witness benefits for themselves, and mention the name of God in the appointed days over what He has provided for them of Grazing (Baheemati) livestock (Al-Anaami). So eat from it and feed the needy and the poor.
After completing the duties, people are allowed to walk around the Kaaba.
22:29 Then let them complete their duties and fulfill their vows, and let them walk around (Yatawafu) the Ancient House (Bait Al Atiq).
People are advised to honor the sacrificing animals without attributing these animals to idols and saying false statements about these animals.
22:30 Thus, and whoever honors the restrictions of God, then it is better for him with His Lord. And the livestock has been made lawful for you; except what is being recited to you; so avoid the taint of idols and avoid saying false statements.
22:31 Monotheists to God, not setting up anything with Him. And whoever sets up partners with God, then it is as if he has fallen from the sky and the birds snatch him or the wind takes him to a place far off.
22:32 Thus, and whoever honors the symbols (Shaaira) of God, then it is from the piety of the hearts.
22:33 In them are benefits to an appointed time, then their place is to the Ancient House (Bait Al Atiq).
God said for every nation he has established duties to mention name of God before sacrificing the animal.
22:34 And for every nation We have established duties that they may mention the name of God over what He has provided for them of the animal livestock. Your god is One God; submit to Him and give good tidings to those who obey.
22:36 And the Big-bodied/bulky animals, We have made them for you to be among the symbols (Shaairi) of God; in them (much) good for you. Then mention name of God over them as they line up (for sacrifice): when they are down on their sides (after slaughter), then you may eat from them and feed the needy and poor. It was thus that We have made them (Animals) in service to you, that you may be thankful.
22:37 Neither their meat nor their blood reaches God, but what reaches Him is the righteousness from you. It was thus that He made them in service to you, so that you may magnify God for what He has guided you to, and give news to the good doers.