Sunan Abi Dawud 4873
سنن أبي داود#4873SahihNarrated Ammar: The Prophet (ﷺ) said: He who is two-faced in this world will have two tongues of fire on the Day of Resurrection
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 43:101