If I were to know that you had been peeping. I would have thrust it in your eyes. Allah has prescribed seeking permission because of protection against glance.
Sahih Muslim Book 38, Hadith 54
← Previous Hadith If I were to know that you had been peeping through the door, I would have thrust that into your eyes, and Allah's Messenger (ﷺ) said: Permission is needed as a protection against glance.

Sahih Muslim Book 38, Hadith 53 Next Hadith → This hadith has been transmitted on the authority of Sahl b. Sa'd as-Sa'idi with a slight variation of wording.

Sahih Muslim Book 38, Hadith 55