Sahih al-Bukhari 1749
Narrated `Abdur-Rahman bin Yazid:
I performed Hajj with Ibn Mas`ud , and saw him doing Rami of the big Jamra (Jamrat-ul-Aqaba) with 
seven small pebbles, keeping the Ka`ba on his left side and Mina on his right. He then said, "This is 
the place where the one on whom Surat-al-Baqara was revealed (i.e. Allah's Messenger (ﷺ) ) stood."
حَدَّثَنَا آدَمُ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنَا الْحَكَمُ، عَنْ إِبْرَاهِيمَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ يَزِيدَ، أَنَّهُ حَجَّ مَعَ ابْنِ مَسْعُودٍ ـ رضى الله عنه ـ فَرَآهُ يَرْمِي الْجَمْرَةَ الْكُبْرَى بِسَبْعِ حَصَيَاتٍ، فَجَعَلَ الْبَيْتَ عَنْ يَسَارِهِ، وَمِنًى عَنْ يَمِينِهِ، ثُمَّ قَالَ هَذَا مَقَامُ الَّذِي أُنْزِلَتْ عَلَيْهِ سُورَةُ الْبَقَرَةِ‏.‏