And we asked Hazrat Jabir bin Abdullah, Allah be pleased with them both, so he said: (The one performing Umrah) should not have intimacy with his wife until he performs sa'i between al-Safa and al-Marwah.
وَسَأَلْنَا جَابِرَ بْنَ عَبْدِ اللَّهِ فَقَالَ لَا يَقْرَبَنَّهَا، حَتَّى يَطُوفَ بَيْنَ الصَّفَا وَالْمَرْوَةِ.
Reference: Sahih Al Bukhari 396