حَدَّثَنَا عَبْدُ الرَّحْمَنِ عَنْ مَالِكٍ عَنْ نَافِعٍ عَنْ ابْنِ عُمَرَ أَنَّ رَجُلًا لَاعَنَ امْرَأَتَهُ وَانْتَفَى مِنْ وَلَدِهَا فَفَرَّقَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بَيْنَهُمَا فَأَلْحَقَ الْوَلَدَ بِالْمَرْأَةِ
مسند امام احمد بن حنبل · Hadith 4527
It was narrated from Ibn 'Umar that a man engaged in li'aan with his wife and disowned her child. The Messenger of Allah (PBUH) separated them and attributed the child to the woman.
Sanad
حَدَّثَنَا عَبْدُ الرَّحْمَنِ عَنْ مَالِكٍ عَنْ نَافِعٍ عَنْ ابْنِ عُمَرَ