Hadith #1 (The Forty Hadith Qudsi)
Narrator(s): Abu Hurayrah
Grade: Sahih

On the authority of Abu Hurayrah (may Allah be pleased with him), who said that the Messenger of Allah (ﷺ) said: When Allah decreed the Creation He pledged Himself by writing in His book which is laid down with Him: My mercy prevails over my wrath.

Source: https://parallelquran.com/hadith/forty-qudsi-1/