"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." (Using translation from Nasāʾī 3477)  

«لَاعَنَ رَسُولُ اللهِ ﷺ بَيْنَ رَجُلٍ وَامْرَأَتِهِ وَفَرَّقَ بَيْنَهُمَا وَأَلْحَقَ الْوَلَدَ بِالْأُمِّ»