'A'isha (Allah be pleased with, her) reported that it had been revealed in the Holy Qur'an that ten clear sucklings make the marriage unlawful, then it was abrogated (and substituted) by five sucklings and Allah's Apostle ﷺ died and it was before that time (found) in the Holy Qur'an (and recited by the Muslims).  

أَنَّهَا قَالَتْ كَانَ فِيمَا أُنْزِلَ مِنَ الْقُرْآنِ عَشْرُ رَضَعَاتٍ مَعْلُومَاتٍ يُحَرِّمْنَ ثُمَّ نُسِخْنَ بِخَمْسٍ مَعْلُومَاتٍ فَتُوُفِّيَ رَسُولُ اللَّهِ ﷺ وَهُنَّ فِيمَا يُقْرَأُ مِنَ الْقُرْآنِ  

There was revealed in the Holy Qur'an ten clear sucklings, and then five clear (sucklings).  

عَائِشَةُ نَزَلَ فِي الْقُرْآنِ عَشْرُ رَضَعَاتٍ مَعْلُومَاتٍ ثُمَّ نَزَلَ أَيْضًا خَمْسٌ مَعْلُومَاتٌ  

Ahadith like this is transmitted by 'A'isha through another chain of narrators.  

أَنَّهَا سَمِعَتْ عَائِشَةَ تَقُولُ بِمِثْلِهِ