A slave born of zina: does he suffice for freeing or not?

Ibrahim and al-Sha'bi said: Wherever freeing a slave is obligatory, giving a child born of zina is not permissible.

Uthman bin al-Aswad said: A man from my family died and had made a bequest to free a slave. I found a slave whose father had married his mother without the permission of his master. I asked Ata about it, and he said: I dislike that.

So-and-so bin Amr said: I asked Abu Ja'far about freeing a child born of zina in the expiation for an oath. He said: It suffices.

Yunus said: A slave born of zina suffices (in an obligatory freeing), and a slave of legitimate birth has no superiority over him except through taqwa (God-consciousness).

Tawus said: In freeing a slave, freeing a child born of zina does not suffice.

Ibrahim said: In an obligatory freeing of a slave, giving a child born of zina does not suffice.

Sa'id bin Abi Sa'id said: A woman came to Sayyiduna Abu Hurayrah (may Allah be pleased with him) and asked: "I have the son of a slave-girl who is not of legitimate birth, and I am obliged to free a slave. Will freeing him suffice?" He said: "Yes."