The Prophet ﷺ said, "Whoever peeks into people's home without their permission, it becomes lawful for them to put out his eye."
عن النبي ﷺ قال: من اطلع في بيت قوم بغير إذنهم، فقد حل لهم أن يفقؤوا عينه.
Muslim narrated it in the Book of Manners (2158:43), from Zuhayr bin Harb, who said, Jareer narrated to us, from Suhayl, from his father, from Abu Hurairah, and he mentioned it.