Musannaf Ibn Abi Shaybah 6617 — Those who ordered prayer at home

Asim bin Amr said: Some people from Iraq came to Sayyiduna Umar (may Allah be pleased with him) and asked him about praying at home. Sayyiduna Umar said: "No one has asked me about this since I asked the Prophet (peace and blessings be upon him) about it. He said: 'A man's prayer in his house is light for him, so illuminate your houses.'"