وَعَنِ أَنَسٍ
أَنَّ اَلنَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «أَبْصِرُوهَا، فَإِنْ جَاءَتْ بِهِ أَبْيَضَ سَبِطًا فَهُوَ لِزَوْجِهَا، وَإِنْ جَاءَتْ بِهِ أَكْحَلَ جَعْدًا، فَهُوَ اَلَّذِي رَمَاهَا بِهِ»
The Prophet (sallallahu alayhi wa sallam) said: “Observe her, and if she gives birth to a child which is white complexioned with dark hair, her husband would be its father. But if she gives birth to a child with eyes looking as if they have antimony (Kuhl) in them and curled hair, the man whom her husband charged her with committing adultery is its father.”.
Bulugh al-Maram 1275, Book 8, Marriage, Hadith 153. 1 min read