Musnad Ahmad 30:2101

Ibrahim ibn Ishaq al-Taliqani narrated to us, he said: Abdullah narrated to us, from Yunus, from al-Zuhri, he said: I heard Sa'id ibn al-Musayyib saying: Abu Hurayrah said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "For the righteous enslaved servant, there are two rewards." "By the One in Whose hand is the soul of Abu Hurayrah, were it not for Jihad in the way of Allah, and Hajj, and kindness to my mother, I would have loved to die while I was an enslaved servant."