قَالَ مَالِكٌ الْأَمْرُ الْمُجْتَمَعُ عَلَيْهِ عِنْدَنَا : أَنَّ كُلَّ عَتَاقَةٍ أَعْتَقَهَا رَجُلٌ. فِي وَصِيَّةٍ أَوْصَى بِهَا فِي صِحَّةٍ أَوْ مَرَضٍ : أَنَّهُ يَرُدُّهَا مَتَى شَاءَ. وَيُغَيِّرُهَا مَتَى شَاءَ، مَا لَمْ يَكُنْ تَدْبِيرًا. فَإِذَا دَبَّرَ، فَلَا سَبِيلَ لَهُ إِلَى رَدِّ مَا دَبَّرَ. ¤
Imam Malik, may Allah have mercy on him, said that as for all bequests of emancipation, whether made in good health or illness, they can be revoked or changed. However, in the case of tadbir, once someone has been made a mudabbar, there is no longer the option to revoke it.