Mukhtasar Bukhari (Abridged) 856 — Stoning each Jamarat with seven

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that when he reached the big Jamrah, he kept the Ka'bah to his left and Mina to his right, and stoned with seven pebbles. He said: "This is how the person upon whom Surah Al-Baqarah was revealed (ﷺ) performed the stoning."