Musnad Abu Ya'la al-Mawsili 109:287

Ibn Numayr narrated to us, my father narrated to us, from al-A‘mash, from Abu Sufyan, from Jabir, who said: I heard the Prophet, peace and blessings of Allah be upon him, saying: "When one of you completes the prayer in the mosque, let him assign a portion of his prayer to his house, for indeed Allah will place goodness in his house from his prayer."