ʿUqba bin Al-Harith said that he had married the daughter of Abi Ihab bin ʿAziz. Later on a woman came to him and said, "I have suckled (nursed) ʿUqba and the woman whom he married (his wife) at my breast." ʿUqba said to her, "Neither I knew that you have suckled (nursed) me nor did you tell me." Then he rode over to see Messenger of Allah ﷺ at Medina, and asked him about it. Messenger of Allah ﷺ said, "How can you keep her as a wife when it has been said (that she is your foster-sister)?" Then ʿUqba divorced her, and she married another man.  

فَقَالَتْ إِنِّي قَدْ أَرْضَعْتُ عُقْبَةَ وَالَّتِي تَزَوَّجَ بِهَا فَقَالَ لَهَا عُقْبَةُ مَا أَعْلَمُ أَنَّكِ أَرْضَعْتِنِي وَلاَ أَخْبَرْتِنِي فَرَكِبَ إِلَى رَسُولِ اللَّهِ ﷺ بِالْمَدِينَةِ فَسَأَلَهُ فَقَالَ رَسُولُ اللَّهِ ﷺ كَيْفَ وَقَدْ قِيلَ فَفَارَقَهَا عُقْبَةُ وَنَكَحَتْ زَوْجًا غَيْرَهُ