Musannaf Ibn Abi Shaybah

Ibrahim says that whoever is obliged to free a slave should buy a single soul (slave), then when he enacts it from one deed to another deed, it will suffice for him, and it will not suffice for what he has not done. So whoever acts, it is like "kana" and its like, and whoever does not act, it is like the blind and the lame.

They used to dislike a lame slave, a crippled slave, and a slave with defective limbs in the obligatory emancipation.

A person asked Hazrat Ikrimah whether a one-eyed slave would suffice in the obligatory land. He replied: Many one-eyed slaves suffice. Then the person returned and asked whether a lame slave would suffice. He replied: On the Day of Judgment, he will come with his lameness.

Ibrahim says that a slave will suffice.

Hazrat Hakam states that if someone is required to free a slave, a mad (insane) slave will not suffice on his behalf.

Hazrat Ibn Jurayj states that I asked Hazrat Ata, "In the case of killing a person, is it sufficient to free a believing slave who is not healthy, and from whom he (the owner) is benefiting, if the slave is lame or has a paralyzed limb?" He denied this and preferred a healthy slave.

Hazrat Aamir says that it is permissible to give a blind slave as expiation.

Hazrat Amr says that I asked Hasan about a blind and disabled slave? He replied, "It is not sufficient."