Sunan an-Nasa'i, Book 26, Hadith 112 (In-Book) ⓘ

It was narrated that 'Aishah said: "One of the things that Allah, the Mighty and Sublime, revealed" -(one of the narrators) Al-Harith said (in his narration): "One of the things that were revealed in the Qur'an"- "was that ten known breast-feedings make marriage prohibited, then that was abrogated and changed to five known breast-feedings. Then the Messenger of Allah passed away when this was something that was still being recited in the Qur'an."

أَخْبَرَنِي هَارُونُ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا مَعْنٌ، قَالَ حَدَّثَنَا مَالِكٌ، وَالْحَارِثُ بْنُ مِسْكِينٍ، قِرَاءَةً عَلَيْهِ وَأَنَا أَسْمَعُ، عَنِ ابْنِ الْقَاسِمِ، قَالَ حَدَّثَنِي مَالِكٌ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ، عَنْ عَمْرَةَ، عَنْ عَائِشَةَ، قَالَتْ كَانَ فِيمَا أَنْزَلَ اللَّهُ عَزَّ وَجَلَّ - وَقَالَ الْحَارِثُ فِيمَا أُنْزِلَ مِنَ الْقُرْآنِ - عَشْرُ رَضَعَاتٍ مَعْلُومَاتٍ يُحَرِّمْنَ ثُمَّ نُسِخْنَ بِخَمْسٍ مَعْلُومَاتٍ فَتُوُفِّيَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَهِيَ مِمَّا يُقْرَأُ مِنَ الْقُرْآنِ ‏.‏