Sahih al-bukhari:1614 Chapter: It is obligatory to perform Hajj (once in a life time) and its superiority Book 25, Hadith 100

Narrated `Urwa: `Aisha said, “The first thing the Prophet (ﷺ) did on reaching Mecca, was the ablution and then he
performed Tawaf of the Ka`ba and that was not `Umra (alone), (but Hajj-al-Qiran). `Urwa added:
Later Abu Bakr and `Umar did the same in their Hajj.” And I performed the Hajj with my father Az-
Zubair, and the first thing he did was Tawaf of the Ka`ba. Later I saw the Muhajirin (Emigrants) and
the Ansar doing the same. My mother (Asma’) told me that she, her sister (`Aisha), Az-Zubair and
such and such persons assumed Ihram for `Umra, and after they passed their hands over the Black
Stone Corner (of the Ka`ba) they finished the Ihram. (i.e. After doing Tawaf of the Ka`ba and Sa`i
between Safa-Marwa.