Sunan Ibn Majah 1940
سنن ابن ماجه#1940SahihIt was narrated that Umm Fadl said:that the Messenger of Allah said: “Breastfeeding once or twice, or suckling once or twice, does not make (marriage) unlawful.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 9:96