Ibn Jurayj (may Allah have mercy on him) says: I said to Ibn Tawus (may Allah have mercy on him): What does your father (Tawus, may Allah have mercy on him) say about a man who makes a contract of manumission with a slave, then he dies, and his daughter inherits that mukatab; he pays his contract to her, then he is freed, and then he dies? He said that he would say: The wala' will belong to the daughter. I thought that no one would differ on this, and he was astonished at their saying that she has no wala'.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المكاتب / 21746