6 chains merged

Allah's Messenger (ﷺ) said, "When Allah completed the creation, He wrote in His Book which is with Him on His Throne, "My Mercy overpowers My Anger."

The Prophet (ﷺ) said, "When Allah created the Creation, He wrote in His Book--and He wrote (that) about Himself, and it is placed with Him on the Throne--'Verily My Mercy overcomes My Anger.'"

When Allah created the creation as He was upon the Throne, He put down in His Book: Verily, My mercy predominates My wrath.

When Allah created the creation, He ordained for Himself and this document is with Him: Verily, My mercy predominates Mv wrath.

“When Allah created the universe, He decreed for Himself: ‘My mercy prevails over My wrath.’”

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. It was related by Muslim (also by al-Bukhari, an-Nasa'i and Ibn Majah).