سنن النسائي

It was narrated that Nafi said: "Abdullah bin Umar went out and he came to Dhul-Hulaifah he entered Ihram for Umrah. Then he traveled a short distance. Then he was afraid that he might be prevented from reaching the House. He said: 'If I am prevented I will do what the Messenger of Allah (ﷺ) did.' He said: 'By Allah, Hajj is jut like Umrah; I ask you to bear witness that I have resolved to do Hajj with my Umrah.' He traveled on until he reached Qudaid, where he bought a Hadi. Then he came to Makkah, and circumambulated the House seven times, and performed Sai between As-Safa and Al-Marwah and said: 'This is what I saw the Messenger of Allah (ﷺ) doing.'"