Hadith 3870
Ibrahim bin Abdur Rahman narrates: Sayyiduna Abdullah (may Allah be pleased with him) threw pebbles from the lower part of the valley, so I said: O Abu Abdur Rahman! People throw pebbles from the upper side, so he replied: By Him besides whom there is no deity, this is the standing place of the one upon whom Surah Al-Baqarah was revealed.