Abu Dharr reported,

He heard the Prophet ﷺ say, "No man accuses another of wickedness or charges him with disbelief without it rebounding upon himself, if his companion is not as he claimed."

Azami 14879

Sahih

عن أبي ذر الغفاري

أنه سمع النبي ﷺ يقول: لا يرمي رجل رجلا بالفسوق، ولا يرميه بالكفر، إلا ارتدت عليه، إن لم يكن صاحبه كذلك.

الأعظمي 14879صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Superior moral conduct
Chapter
Vices of character
Section
Warning against calling one's brother "O disbeliever"
Numbering
Jami al-Kamil 14879 (2nd edition)
Azami 14879