Sunan an-Nasa'i 3311
سنن النسائي#3311SahihSa'eed narrated from Qatadah:"We wrote to Ibrahim bin Yazid An-Nakha'i asking him about breast-feeding. He wrote back saying that Shuraih had narrated that 'Ali and Ibn Mas'ud used to say: 'A little or a lot of breast-feeding makes marriage prohibited.'" In his book, it said that Abu Ash-Sha'tha' Al-Muharibi narrated that 'Aishah had told him that the Prophet of Allah used to say: "Suckling (Al-Khatfah) 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 Isnaad
Al-AlbaniSahih Isnaad
Zubair Ali ZaiSahih
In-book reference: 26:116