(45) باب نَفْىِ الْوَلَدِ بِاللِّعَانِ وَإِلْحَاقِهِ بِأُمِّهِ
It was narrated that Ibn 'Umar said:
"The Messenger of Allah conducted the procedure of Li'an between a man and his wife, and he separated them and attributed the child to his mother."
Reference: Sunan an-Nasa'i 3477
In-book reference: Book 27, Hadith 89
English translation: Vol. 4, Book 27, Hadith 3507