عَنْ أُمِّ الْفَضْلِ قَالَتْ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فِي بَيْتِي فَجَاءَ أَعْرَابِيٌّ فَقَالَ: يَا رَسُولَ اللَّهِ! كَانَتْ لِي امْرَأَةٌ فَتَزَوَّجْتُ عَلَيْهَا امْرَأَةً أُخْرَى فَزَعَمَتِ امْرَأَتِي الْأُولَى أَنَّهَا أَرْضَعَتْ امْرَأَتِي الْحَدْثَى إِمْلَاجَةً أَوْ إِمْلَاجَتَيْنِ، وَقَالَ مَرَّةً: رَضْعَةً أَوْ رَضْعَتَيْنِ، فَقَالَ: ((لَا تُحَرِّمُ الْإِمْلَاجَةُ وَلَا الْإِمْلَاجَتَانِ)) أَوْ قَالَ: ((الرَّضْعَةُ أَوِ الرَّضْعَتَانِ))
It is narrated from Sayyida Umm Fadl (may Allah be pleased with her) that the Noble Prophet (peace and blessings be upon him) was present in my house when a Bedouin came to him and said: O Messenger of Allah! I had a wife, and I have now married another woman. Now my first wife claims that she has breastfed my new wife once or twice. The Prophet (peace and blessings be upon him) said: The relationship does not become unlawful by breastfeeding once or twice.