Musnad Ahmad 33:1126

Musa ibn Dawud narrated to us, Sulayman ibn Bilal narrated to us, from Ja’far, from his father, from Jabir ibn Abdullah, that the Prophet, peace and blessings of Allah be upon him, performed *ramal* (a brisk walk) for three circuits from the Stone to the Stone, and prayed two rak'ahs. Then he returned to the Stone, then went to Zamzam and drank from it, and poured [some] over his head. Then he returned and touched the Corner, then returned to al-Safa, and said: "I begin with that which Allah, the Mighty and Majestic, began with."