Musnad Ahmad 25:361

Muhammad ibn Rabi‘ah narrated to us, ‘Abbad ibn Mansur narrated to us, from ‘Ikrimah, from Ibn ‘Abbas, who said: "The Messenger of Allah, may Allah bless him and grant him peace, decreed regarding the son of the woman involved in *li‘an* (mutual imprecation) that he shall not be attributed to a father. And whoever accuses her or accuses her child, then he shall be flogged with the prescribed punishment (*hadd*). And he decreed that she has no right to maintenance from him, nor housing, because they are separated without divorce and without the husband having passed away."