Hajj after Muhammads death.
Sahih Al Bukhari 2.704: Bk 25.123
Narrated Nafi`: Ibn `Umar intended to perform Hajj in the year when Al−Hajjaj attacked Ibn Az−Zubair. Somebody said to Ibn `Umar, "There is a danger of an impending war between them." Ibn `Umar said, "Verily, in Allah's Apostle you have a good example. (And if it happened as you say) then I would do the same as Allah's Apostle had done. I make you witness that I have decided to perform `Umra." Then he set out and when he reached Al−Baida', he said, "The ceremonies of both Hajj and `Umra are similar. I make you witness that I have made Hajj compulsory for me along with `Umra." He drove (to Mecca) a Hadi which he had bought from (a place called) Qudaid and did not do more than that. He did not slaughter the Hadi or finish his Ihram, or shave or cut short his hair till the day of slaughtering the sacrifices (10th Dhul−Hijja). Then he slaughtered his Hadi and shaved his head and considered the first Tawaf (of Safa and Marwa) as sufficient for Hajj and `Umra. Ibn `Umar said, "Allah's Apostle did the same."

Sahih Al Bukhari 2.767: Bk 25.187
Narrated `Amra bint `Abdur−Rahman: I heard `Aisha saying, "Five days before the end of Dhul−Qa'da we set out from Medina in the company of Allah's Apostle with the intention of performing Hajj only. When we approached Mecca, Allah's Apostle ordered those who had no Hadi with them to finish their lhram after performing Tawaf of the Ka`ba and (Sa`i) and between Safa and Marwa." `Aisha added, "On the day of Nahr (slaughtering of sacrifice) beef was brought to us. I asked, 'What is this?' The reply was, 'Allah's Apostle (p.b.u.h) has slaughtered (sacrifices) on behalf of his wives.' "

Sahih Al Bukhari 2.768: Bk 25.188
Narrated Nafi`: `Abdullah (bin `Umar), used to slaughter (his sacrifice) at the Manhar. ('Ubaidullah, a sub−narrator said, "The Manhar of Allah's Apostle.")

Sahih Al Bukhari 2.771: Bk 25.191
Narrated Zaid bin Jubair: I saw Ibn `Umar passing by a man who had made his Badana sit to slaughter it. Ibn `Umar said, "Slaughter it while it is standing with one leg tied up as is the tradition of Muhammad."

Sahih Al Bukhari 2.779: Bk 25.199
Narrated Ibn `Abbas: The Prophet was asked about a person who had his head shaved before slaughtering (his Hadi) (or other similar ceremonies of Hajj). He replied, "There is no harm, there is no harm."

Sahih Al Bukhari 2.780: Bk 25.200
Narrated Ibn `Abbas: A man said to the Prophet "I performed the Tawaf−al−Ifada before the Rami (throwing pebbles at the Jamra)." The Prophet replied, "There is no harm." The man said, "I had my head shaved before slaughtering." The Prophet replied, "There is no harm." He said, "I have slaughtered the Hadi before the Rami." The Prophet replied, "There is no harm."

Sahih Al Bukhari 2.781: Bk 25.201
Narrated Ibn `Abbas: The Prophet was asked by a man who said, "I have done the Rami in the evening." The Prophet replied, "There is no harm in it." Another man asked, "I had my head shaved before the slaughtering." The Prophet replied, "There is no harm in it."

Sahih Al Bukhari 2.782: Bk 25.202
Narrated Abu Musa: I came upon Allah's Apostle when he was at Al−Batha. He asked me, "Have you intended to perform the Hajj?" I replied in the affirmative. He asked, "For what have you assumed lhram?" I replied," I have assumed Ihram with the same intention as that of the Prophet ." The Prophet said, "You have done well! Go and perform Tawaf round the Ka`ba and between Safa and Marwa." Then I went to one of the women of Bani Qais and she took out lice from my head. Later, I assumedthe Ihram for Hajj. So, I used to give this verdict to the people till the caliphate of `Umar. When I told him about it, he said, "If we take (follow) the Holy Book, then it orders us to complete Hajj and `Umra (Hajj−at−Tamattu`) and if we follow the tradition of Allah's Apostle then Allah's Apostle did not finish his lhram till the Hadi had reached its destination (had been slaughtered). (i.e. Hajj−al−Qiran). (See Hadith No. 630)

Sahih Al Bukhari 2.791: Bk 25.213
Narrated Ibn `Abbas: The Prophet was asked (as regards the ceremonies of Hajj) at Mina on the Day of Nahr and he replied that there was no harm. Then a man said to him, "I got my head shaved before slaughtering." He replied, "Slaughter (now) and there is no harm in it." (Another) man said, "I did the Rami (of the Jimar) after midday." The Prophet replied, "There was no harm in it."

Sahih Al Bukhari 2.792: Bk 25.214
Narrated `Abdullah bin `Amr : Allah's Apostle stopped (for a while near the Jimar at Mina) during his last Hajj and the people started asking him questions. A man said, "Ignorantly I got my head shaved before slaughtering." The Prophet replied,"Slaughter (now) and there is no harm in it." Another man said, "Unknowingly I slaughtered the Hadi before doing the Rami." The Prophet said, "Do Rami now and there is no harm in it." So, on that day, when the Prophet was asked about anything (about the ceremonies of Hajj) done before or after (its stated time) his reply was, "Do it (now) and there is no harm."

Sahih Al Bukhari 3.37: Bk 27.5
Narrated Salim: (Abdullah) bin `Umar used to say, "Is not (the following of) the tradition of Allah's Apostle sufficient for you? If anyone of you is prevented from performing Hajj, he should perform the Tawaf of the Ka`ba and between As−Safa and Al−Marwa and then finish the Ihram and everything will become legal for him which was illegal for him (during the state of Ihram) and he can perform Hajj in a following year and he should slaughter a Hadi or fast in case he cannot afford the Hadi."

Sahih Al Bukhari 3.38: Bk 27.6
Narrated Al−Miswar: Allah's Apostle slaughtered (the Hadi) before he had his head shaved and then he ordered his Companions to do the same.

Sahih Al Bukhari 4.201: Bk 56.164
Narrated `Aisha: We set out in the company of Allah's Apostle five days before the end of Dhul Qa'da intending to perform Hajj only. When weapproached Mecca Allah's Apostle ordered those who did not have the Hadi (i.e. an animal for sacrifice) with them, to perform the Tawaf around the Ka`ba, and between Safa and Marwa and then finish their Ihram. Beef was brought to us on the day of (i.e. the days of slaughtering) and I asked, "What is this?" Somebody said, Allah's Apostle has slaughtered (a cow) on behalf of his wives."