Musannaf Ibn Abi Shaybah 22896 — A mukatab who begs and is given

It is narrated from al-Hasan (may Allah have mercy on him) that a contracted slave (mukatab) begged for the freeing of one or two people and was given. When what he had been given became a great deal in the eyes of Sayyiduna Abu Musa (may Allah be pleased with him), he called for him, and he came bringing what he had been given. He then looked at what had been asked for and gave him that amount; he kept what was left over and freed one or more slaves with it.