Sahih al-bukhari:1693 Chapter: It is obligatory to perform Hajj (once in a life time) and its superiority Book 25, Hadith 172

Narrated Nafi`: `Abdullah (bin `Abdullah) bin `Umar said to his father, “Stay here, for I am afraid that it (affliction
between Ibn Zubair and Al-Hajjaj) might prevent you from reaching the Ka`ba.” Ibn `Umar said, “(In
this case) I would do the same as Allah’s Messenger (ﷺ) did, and Allah has said, ‘Verily, in Allah’s Messenger (ﷺ),
you have a good example (to follow).’ So, I make you, people, witness that I have made `Umra
compulsory for me.” So he assumed lhram for `Umra. Then he went out and when he reached Al-
Baida’, he assumed Ihram for Hajj and `Umra (together) and said, “The conditions (requisites) of Hajj
and `Umra are the same.” He, then brought a Hadi from Qudaid. Then he arrived (at Mecca) and
performed Tawaf (between Safa and Marwa) once for both Hajj and `Umra and did not finish the
lhram till he had finished both Hajj and `Umra.