There is a state of war between people and we fear that they would detain you, whereupon he ('Abdullah b. Umar) said:" Verily in the Messenger of Allah there is a model pattern for you." I would do as Allah's Messenger (ﷺ) did. I call you as witness that I have undertaken to perform 'Umra. He then set out until, when he reached the rear side of al-Baida', he said: There is one command both for Hajj and Umra. so bear witness. Ibn Rumh said: I call you as witness that I have undertaken to perform my Hajjalong with my Umra (i. e. I am performing both of them as Qiran), and he offered the sacrifice of animals which he had bought at Qudaid. He then proceeded pronouncing Talbiya for both of them together until he reached Mecca, He circumambulated the House. and (ran) between al-Safa' and al-Marwa and made no addition to it. He neither sacrificed the animal, nor got his head shaved, nor got his hair clipped, nor did he make anything lawful which was unlawful (due to Ihram) until it was the Day of Sacrifice (10th of Dhu'l-Hijja). He then offered sacrifice, and got his hair cut, and saw that circumambulation of Hajj and 'Umra was complete with the first circumambulation. Ibn 'Umar said: This is how Allah's Messenger (ﷺ) had done.
Sahih Muslim Book 15, Hadith 200
"We said: 'O Messenger of Allah (ﷺ), we know about sending salams upon you, but how should we send salah upon you?' He said: "Say: 'Alahumma salli 'ala Muhammad wa 'ala ali Muhammad, kama sallaita 'ala Ibrahima wa barik 'ala Muhammad kama barakta 'ala ali Ibrahim fil-'alamin, innaka hamidun majid (O Allah, send salah upon Muhammad and upon the family of Muhammad, as You sent salah upon the family of Ibrahim, and send blessings upon Muhammad and upon the family of Muhammad as You sent blessings upon the family of Ibrahim among the nations. You are indeed Worthy of praise, Full of glory.)'" (One of the narrators) Ibn Abi Laila said: "We used to say: 'And also upon us.'" Abu Abdur-Rahman (An-Nasa'I) said: It was narrated from his book, and this is a mistake.
Sunan an-Nasa'i Book 13, Hadith 109
Yahya related to me from Malik from Zayd ibn Aslam that the
Messenger of Allah, may Allah bless him and grant him peace, said, "If
someone changes his deen - strike his neck!"
The meaning of
the statement of the Prophet, may Allah bless him and grant him peace,
in our opinion and Allah knows best, is that "if someone changes his
deen, strike his neck!" refers to those who leave Islam for other than
it - like the heretics and their like, about whom it is known. They
are killed without being called to tawba because their tawba is not
recognised. They were hiding their kufr and publishing their Islam, so
I do not think that one calls such people to tawba, and one does not
accept their word. As for the one who goes out of Islam to something
else and divulges it, one calls him to tawba. If he does not turn in
tawba, he is killed. If there are people in that situation, I think
that one should call them to Islam and call them to tawba. If they
turn in tawba, that is accepted from them. If they do not turn in
tawba, they are killed. That does not refer as we see it, and Allah
knows best, to those who come out of Judaism to Christianity or from
Christianity to Judaism, nor to someone who changes his deen from the
various forms of deen except for Islam. Whoever comes out of Islam to
other than it and divulges that, that is the one who is referred to,
and Allah knows best!
Muwatta Malik Book 36, Hadith 25