Sunan an-Nasai 18045
In-book no 3309أَخْبَرَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، قَالَ حَدَّثَنَا عَلِيُّ بْنُ هَاشِمٍ، { عَنْ هِشَامِ بْنِ عُرْوَةَ، } عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ، عَنْ أَبِيهِ، عَنْ عَمْرَةَ، قَالَتْ سَمِعْتُ عَائِشَةَ، تَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " يَحْرُمُ مِنَ الرَّضَاعِ مَا يَحْرُمُ مِنَ الْوِلاَدَةِ " .
It was narrated that 'Amrah said: "I heard 'Aishah say: The Messenger of Allah said: 'What becomes unlawful (for marriage) through breast-feeding is that which becomes unlawful through birth.'"