From Sahih Muslim (Hadith 3134):
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
Reference: Muslim 3134