Musnad Ahmad 30:1372

Yunus narrated to us, Laith narrated to us, from Yazid—meaning Ibn al-Had—from ‘Amr, from al-Maqburi, from Abu Hurayrah, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Indeed, Allah, the Almighty and Majestic, says: 'My believing servant is in the position of every good to Me; he praises Me while I extract his soul from between his two sides.'"