The Prophet (ﷺ) said: He who forged in order to put things right between two persons did not lie. The version by Ahmad ibn Muhammad and Musaddad has: The liar is not the one who puts things right between people, saying what is good and increasing good.
Sunan Abi Dawud Book 43, Hadith 148
← Previous Hadith The Prophet (ﷺ) said: Shall I not inform you of something more excellent in degree than fasting, prayer and almsgiving (sadaqah)? The people replied: Yes, Prophet of Allah! He said: It is putting things right between people, spoiling them is the shaver (destructive).

Sunan Abi Dawud Book 43, Hadith 147 Next Hadith → I did not hear the Messenger of Allah (ﷺ) making a concession for anything people say falsely except in three matters. The Messenger of Allah (ﷺ) would say: I do not count as a liar a man who puts things right between people, saying a word by which he intends only putting things right, and a man who says something in war, and a man who says something to his wife, or a wife who says something to her husband.

Sunan Abi Dawud Book 43, Hadith 149