Musnad Ahmad 907:87

Yahya ibn Abi Bukayr narrated to us, Ibrahim ibn Tahman narrated to us, Simak ibn Harb narrated to me, from Jabir ibn Samurah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Verily, I know a stone in Makkah that used to greet me before I was sent [as a Prophet]. Verily, I know it now."