Leave what makes you doubt

On the authority of Abu Muhammad al-Hasan ibn Ali ibn Abi Talib, the grandson of the Messenger of Allah (may Allah bless him and grant him peace) and his fragrant flower (may Allah be pleased with them both), who said: “I memorised from the Messenger of Allah (may Allah bless him and grant him peace) the following: "Leave what makes you doubt for what does not make you doubt."

Related by an-Nasa'i and at-Tirmidhi. At-Tirmidhi said: “A hasan sahih hadith.”

[at-Tirmidhi 2518; an-Nasa'i 5711]