“I heard the Messenger of Allah (ﷺ) say: 'Reconciling between Muslims is permissible, except reconciliation that forbids something that is allowed, or allows something that is forbidden.'”
Sunan Ibn Majah Book 13, Hadith 46
← Previous Hadith his parents referred their dispute to the Prophet (ﷺ), and one of them was a disbeliever. He (the Prophet (ﷺ)) said: “O Allah, guide him,” and he turned towards the Muslim, and he ruled that he should go with that parent.

Sunan Ibn Majah Book 13, Hadith 45 Next Hadith → there was a man at the time of the Messenger of Allah (ﷺ) whose mental faculties were lacking, and he used to buy and sell. His family came to the Prophet (ﷺ) and said, “O Messenger of Allah, stop him.” So The Prophet (ﷺ) called him, and told him not to do that. He said: “O Messenger of Allah (ﷺ), I cannot bear to be away from business.” He said, “If you engage in a transaction then say: “Take it (i.e., the goods) and don't cheat (me).' ”

Sunan Ibn Majah Book 13, Hadith 47