from his father (from the Prophet (ﷺ)) who said: "O 'Ali! Do not follow a look with a look, the first is for you, but the next is not for you."
Jami` at-Tirmidhi Book 43, Hadith 47
← Previous Hadith "I asked the Messenger Of Allah (ﷺ) about the unintentional glance, so he ordered me that I divert my sight."

Jami` at-Tirmidhi Book 43, Hadith 46 Next Hadith → to Ibn Shihab, that Umm Salamah narrated to him, that she and Maimunah were with the Messenger of Allah (ﷺ), she said: "So when we were with him, Ibn Umm Maktum came, and he entered upon him, and that was after veiling had been ordered for us. So the Messenger of Allah (ﷺ) said: 'Veil yourselves from him.' So I said: 'O Messenger of Allah! Is he not blind such that he can not see us or recognize us?' So the Messenger of Allah (ﷺ) said: 'Are you two blind such that you can not see him?'"

Jami` at-Tirmidhi Book 43, Hadith 48