Sunan an-Nasa'i 2930
It 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
أَخْبَرَنَا مُحَمَّدُ بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، قَالَ سَمِعْتُ ابْنَ عُمَرَ، وَسَأَلْنَاهُ، عَنْ رَجُلٍ، قَدِمَ مُعْتَمِرًا فَطَافَ بِالْبَيْتِ وَلَمْ يَطُفْ بَيْنَ الصَّفَا وَالْمَرْوَةِ أَيَأْتِي أَهْلَهُ قَالَ لَمَّا قَدِمَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَطَافَ سَبْعًا وَصَلَّى خَلْفَ الْمَقَامِ رَكْعَتَيْنِ وَطَافَ بَيْنَ الصَّفَا وَالْمَرْوَةِ وَقَدْ كَانَ لَكُمْ فِي رَسُولِ اللَّهِ أُسْوَةٌ حَسَنَةٌ ‏.‏