مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2216
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: Whoever comes for Hajj, circumambulates the House and goes between as-Safa and al-Marwah, it is no longer Hajj; rather it becomes ‘Umrah. That was the Sunnah of Allah, may He be glorified and exalted, and the Sunnah of His Messenger (ﷺ).
Musnad Ahmad 2223Its isnad is da’eef]