This hadith has been transmitted on the authority of A'mash and in the hadith transmitted on the authority of 'Isa the words are: Make it a source of reward, and in the hadith transmitted on the authority of Abu Hurairah (RA) (the words are): "Make it a source of mercy."
Hadith Referenceصحيح مسلم / كتاب البر والصلة والآداب / 2602
Jabir bin 'Abdullah (RA) reported Allah's Messenger (ﷺ) as saying: I am a human being and I have made this term with my Lord, the Exalted and Glorious: For any servant amongst Muslims whom I curse or scold, make that a source of purity and reward.
Hadith Referenceصحيح مسلم / كتاب البر والصلة والآداب / 2602