Jami` at-Tirmidhi Book 43, Hadith 46
"I asked the Messenger Of Allah (ﷺ) about the unintentional glance, so he ordered me that I divert my sight."
from his father who said: "I guided Allah's Prophet (ﷺ) and Al-Hasan and Al-Husain, on his gray mule until I brought him to the apartment of the Prophet (ﷺ), this one was in front of him, and this one behind him."
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."