Sahih Muslim Book 7, Hadith Number 2973.

Chapter : Stoning at Jamrat al-‘Aqaba from the heart of the valley in the state that Mecca is on the left side and pronouncing of takbir while throwing every pebble.

Abd al-Rahman b. Yazid reported that he performed Hajj along with ‘Abdullah (Allah be pleased with him) and he flung seven pebbles at al-Jamra (from a position) that the House was on his left and Mina was on his right and said: That is the place (of flinging pebbles of one) upon whom Surah al-Baqara was revealed.