Hadithcore
Musnad Ahmad 1737
hasan

It was narrated from ‘Ali bin Husain that his father (رضي الله عنه) said: The Messenger of Allah (ﷺ) said:

“Part of a person"s being a good Muslim is his leaving aione that which does not concern him.”

References1 variant
Arabic/English book
Book 17, Hadith 1737