486—Manumission is one of the most virtuous acts of worship, as stated in the hadith: “For any Muslim man who emancipates a Muslim man, Allah will save one of the emancipator’s limbs from the Fire for every limb of the emancipated slave.” Agreed upon1.
487—The Messenger of Allah (peace and blessings be upon him)2 was asked, “Which slave is best to emancipate?” He replied, “The one who commands the highest price and is most highly valued by his owners.” Agreed upon3.
488—Manumission takes effect:
(a) By declaration: using the term “manumission” or any expression conveying the same meaning.
(b) By ownership: if someone comes to own a blood relative within the prohibited degrees of marriage, that relative automatically becomes free.
(c) By mutilating his slave, whether by severing one of his limbs or burning him.
(d) By extension of emancipation4, as stated in the hadith: “Whoever emancipates a share that he owns in a slave, if he possesses enough wealth to cover the slave’s price, the slave shall be appraised at a fair value at his expense,