Musannaf Ibn Abi Shayba 3:4073

Abu Mu'awiyah narrated to us, from al-A'mash, from Abu Sufyan, from Jabir, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "When one of you completes the prayer in his mosque, let him assign a portion of his prayer to his house, for indeed Allah will place goodness in his house because of his prayer."