Musannaf Ibn Abi Shaybah 27914 — What is disliked of a man peering

Abu Suwayd al-Abdi said: We were at the door of Sayyiduna Ibn Umar (may Allah be pleased with them both), seeking his permission, when my glance happened to fall inside, and he saw me. He said: "Which of you looked into my house?" I said: "I did, may Allah set you right; my glance suddenly fell, and I saw." He said: "Is it lawful for you to look into my house?"