Hadith.3562 - Muawiyah ibn Maytharah narrated from Abu Abdullah (as)
I asked him about a man who sells his slave at a reduced price so that he may be freed, and the slave says to him in private, "I will give you such-and-such amount."
Is it permissible for the man to take it from him?
Imam (as) replied: "He may take it from him willingly and ask him for it politely. But if the slave refuses, then let him leave it."