Sunan an-Nasa'i 3309
سنن النسائي#3309SahihIt was narrated from 'Abdullah bin Az-Zubair that the Prophet said:"Suckling once or twice does not make (marriage) prohibited
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 26:114