1. A Mukatab's bequest is not implemented even if he left sufficient funds.
2. One may annul one's bequest, but the cancellation must be explicit.
3. One may make a bequest of the services of one?s slave or residence of one's house for a specified time, just as one may do it for an indefinite time. If the value of the slave is within the third, the slave will be handed to the beneficiary for service. If the stave is the entire estate, he will serve the heirs two days and the beneficiary one day. When the beneficiary dies then the slave is entirely for the heirs.

~ al-Quduri ~