Hadith #3115 (Sunan Abi Dawud)
Book: Funerals (Kitab Al-Jana'iz)
Narrator(s): Abdul Hameed bin Ja'far عبد الحميد بن جعفر بن عبد الله, Kathir bin Marrah al-Hadrami كثير بن مرة الحضرمي, Mu'adh ibn Jabal, Salah bin Abi Aryb صالح بن أبي عريب
Grade: Sahih

The Messenger of Allah (ﷺ): When you attend dying man, you should say good words, for the angels say Amin to what you say. When Abu Salamah died, I said: What should I say, Messenger of Allah? He said: O Allah forgive him, and give us something good in exchange. She said: So Allah gave me Muhammad (ﷺ) in exchange for him.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-3115/