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On the authority of Abu Muhammad al-Hasan bin Ali bin Abi Taib, the grandson of the Messenger of Allah, sallallahu ëalayhi wasallam, and who is dearest to him, radiyallahu ëanhuma, who said: ìI committed to memory from the Messenger of Allah, sallallahu ëalayhi wasallam, (the following words):

"Leave that about which you are in doubt for that about which you are in no doubt."

[Al-Tirmidhi and al-Nasaíi related it, and al-Tirmidhi said: It is a good and genuine Hadith]