Sunan an-Nasa'i, Hadith 3309 ⓘ
It was narrated from 'Abdullah bin Az-Zubair that the Prophet said: "Suckling once or twice does not make (marriage) prohibited."
أَخْبَرَنَا شُعَيْبُ بْنُ يُوسُفَ، عَنْ يَحْيَى، عَنْ هِشَامٍ، قَالَ حَدَّثَنِي أَبِي، عَنْ عَبْدِ اللَّهِ بْنِ الزُّبَيْرِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ تُحَرِّمُ الْمَصَّةُ وَالْمَصَّتَانِ " .
also referenced under: Book 26, Hadith 114 (In-Book) & Volume 4, Book 26, Hadith 3311 (DarusSalam)