The Book of Marriage
26/51. Chapter:
The Amount Of Breast-feeding That Makes Marriage Prohibited
Sunan an-Nasai
أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ الصَّبَّاحِ بْنِ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ سَوَاءٍ، قَالَ حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، وَأَيُّوبَ، عَنْ صَالِحٍ أَبِي الْخَلِيلِ، عَنْ عَبْدِ اللَّهِ بْنِ الْحَارِثِ بْنِ نَوْفَلٍ، عَنْ أُمِّ الْفَضْلِ، أَنَّ نَبِيَّ اللَّهِ صلى الله عليه وسلم سُئِلَ عَنِ الرَّضَاعِ فَقَالَ " لاَ تُحَرِّمُ الإِمْلاَجَةُ وَلاَ الإِمْلاَجَتَانِ " . وَقَالَ قَتَادَةُ " الْمَصَّةُ وَالْمَصَّتَانِ " .
It was narrated from Umm Fadl that the Prophet of Allah was asked about breast-feeding and said: "Suckling (Al-Imlajah) once or twice does not make (marriage) prohibited." And (one of the narrators) Qatadah said (in his narration): "Suckling (Al-Massah) once or twice does not make (marriage) prohibited."
Reference : Sunan an-Nasa'i 3308In-book reference : Book 26, Hadith 113English translation : Vol. 4, Book 26, Hadith 3310