Musnad Ahmad 26:452

Yahya ibn Adam narrated to us, Sufyan narrated to us, from al-A’mash, from Ibrahim, from ‘Abd al-Rahman ibn Yazid, who said: I saw ‘Abdullah throw the pebbles at the Jamrah from the bottom of the valley. Then he said: "From here—by the One besides whom there is no god—stood the one upon whom Surat al-Baqarah was revealed."