Musannaf Ibn Abi Shaybah 33489 — A child born of fornication: to whom

Al-Sha'bi reports that Sayyiduna Ali (may Allah be pleased with him) and Sayyiduna Abdullah (may Allah be pleased with him) said regarding the son of the woman who underwent li'an that his mother and his mother's agnates (asabah) are the agnates of this child, and the child of zina (an illegitimate child) has the same ruling.