Sunan an-Nasa'i 2930
سنن النسائي#2930SahihIt was narrated that Amr said:"I head Ibn Umar say - When we asked him about a man who came for Umrah, and perfomed Tawaf around the House, but did not perform Sai betwwen As-Safa and al-Marwah, could he be intimate with his wife? He said: 'When the Messenger of Allah came, he circumambulated seven times, and prayed two Rakahs behind the Maqam, and performed Sai between As-Safa and Al-Marwah. And you have the best examples in the Messenger of Allah.'" (Sahih) Chpater 143. What Should A Person Do If He Enters Ihram For Hajj and Umrah But he Has Not Brought A Hadi
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 24:313