Sunan an-Nasa'i 3309
سنن النسائي#3309Sahihأَخْبَرَنَا 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 " .
It was narrated from 'Abdullah bin Az-Zubair that the Prophet said:"Suckling once or twice does not make (marriage) prohibited
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 26:114