And in Muslim, he said: "Buy her and free her, and stipulate for them the wala' (clientage)."

The Shaykh : Then he said: "And in Muslim" is the beginning of today's lesson. He said: These three commands are not for obligation, nor for recommendation, but for permissibility. That means there is no harm in buying her, even if she is a mukatabah (a slave who has contracted to buy her freedom). It is derived from this wording that it is permissible to sell a mukatab (a slave who has contracted to buy his freedom). Or did we pass over this?
The student: ...

The Shaykh : We passed over this at the beginning of the benefits, and that it is permissible to free him, and that is the case. It is permissible to sell a mukatab, and the buyer takes the place of the one who contracted with him. If he is freed, the wala' (clientage) belongs to the buyer. If the buyer wishes to hasten his freedom, he has that right. And it is derived from his saying: what we mentioned at his saying in the core of the hadith .