Musannaf Ibn Abi Shayba 27:90

Muhammad ibn Mus'ab narrated to us, from al-Awza'i, from al-Zuhri, from Abu Salamah, from Abu Hurayrah, that the Prophet (peace and blessings of Allah be upon him) said: "I am the master of the children of Adam, and I am the first for whom the earth will split open, and I am the first intercessor and the first whose intercession will be accepted."