I know we have our own Ahadiths but if we come across a Sunni Hadith which has been narrated by Imam Ali or any other member of RasoolAllahs family or any righteous companion than can we take from it and consider it authentic if we don’t take from sources like Abu Bakr or Ibn Abbas or Muawiyah or Uthman or Abu Huraira and etc?

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We still need to verify the hadith based on the general conditions outlined by the Qur’an and Ahlulbayt, such as:

1- Is it compatible with the Qur’an or does it go against the Qur’an?

2- Is it compatible with the other teachings of Ahlulbayt (a) or it goes against their teachings?

3- The hadith may be attributed to Imam Ali, but maybe one of the narrators fabricated it or tampered with it, so we still need to do research on it and not quickly accept it ad authentic.