Musnad Abu Ya'la al-Mawsili 159:55

Wahb narrated to us, Khalid informed us, from Abd al-Rahman, from Abu al-Zinad, from al-A'raj, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "One of you remains in a state of prayer as long as the prayer detains him, and nothing prevents him from returning to his family except his waiting for the prayer."