Abdur Rahman ibn Yazid said that when Abdullah (RA) came to jamrat uI-aqabah in the middle of the valley, he faced the Ka’bah and began to cast pebbles at the jamrah to his right. He cast seven pebbles, calling out the takbir at each throw. He then said, “By Allah beside Whom is no one (worthy of worship), from here, he, on whom surah al-Baqarah was revealed, cast pebbles.”
[Bukhari 1747, Muslim 1296, Abu Dawud 1974, Nisai 3067, Ibn e Majah 3030]