Sunan An-Nasa'i
Hadith #3308
It was narrated from Umm Fadl that the Prophet of Allah was asked about breast-feeding and said:""Suckling (Al-Imlajah) once or twice does not make (marriage) prohibited."" And (one of the narrators) Qatadah said (in his narration): ""Suckling (Al-Massah) once or twice does not make (marriage) prohibited