Imam Malik, may Allah have mercy on him, said that if an umm walad injures someone, the blood money must be given by her master, except in the case where the blood money exceeds the value of the umm walad. In such a case, it is not obligatory for the master to hand over the slave woman or slave to the victim of the crime, even if the blood money is more than the value of the slave woman or slave. Here, the master of the umm walad cannot hand over the umm walad to the victim of the crime, because the sale, gift, or any kind of transfer of ownership of the umm walad is not permissible; rather, it is against the ancient Sunnah. Therefore, the value of the umm walad itself stands in place of the umm walad, and the master is not obliged to pay more than that. I have heard very well that it is not obligatory for the master to pay more than the value of the umm walad in the case of a crime.

Sayyiduna Umar ibn Khattab (may Allah be pleased with him) or Sayyiduna Uthman ibn Affan (may Allah be pleased with him) gave the ruling: If a woman deceives someone by saying, "I am free," then marries and has children, and afterwards it is discovered that she is someone’s slave-girl, then by giving a slave-boy or slave-girl like her children, he can ransom his children.

Imam Malik (may Allah have mercy on him) said that in my view, giving the price is better.