Narrated Anas ibn Malik:
The Prophet (ﷺ) said: When I was taken up to heaven
I passed by people who had nails of copper and were scratching their faces and their breasts
I said: Who are these people, Gabriel? He replied:
They are those who were given to back biting and who aspersed (Attack, critize or insult) people’s honour
Source
General Behavior (Kitaab Al-Adab) Chapter: Regarding backbiting (al-ghibah)
Grade: Sahih (Al-Albani)
Sunan Abi Dawud 4878 In-book reference : Book 43, Hadith 106 English translation : Book 42, Hadith 4860