Sunan Ibn Majah, Volume 3, Book 9, Hadith 1942 (DarusSalam) ⓘ
It was narrated that 'Aishah said: “Once of the things that Allah revealed in the the Qur'an and then abrogated was that nothing makes marriage prohibited except ten breastfeedings or five well-known (breastfeedings).”
حَدَّثَنَا عَبْدُ الْوَارِثِ بْنُ عَبْدِ الصَّمَدِ بْنِ عَبْدِ الْوَارِثِ، حَدَّثَنَا أَبِي، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْقَاسِمِ، عَنْ أَبِيهِ، عَنْ عَمْرَةَ، عَنْ عَائِشَةَ، أَنَّهَا قَالَتْ كَانَ فِيمَا أَنْزَلَ اللَّهُ مِنَ الْقُرْآنِ ثُمَّ سَقَطَ لاَ يُحَرِّمُ إِلاَّ عَشْرُ رَضَعَاتٍ أَوْ خَمْسٌ مَعْلُومَاتٌ .
also referenced under: Hadith 1942 (Reference) & Book 9, Hadith 2018 (In-Book)