Allah's Apostle, does one suckling make the (marriage) unlawful? He said: No.
Sahih Muslim Book 17, Hadith 25
← Previous Hadith A bedouin came to Allah's Apostle (ﷺ) when he was in my house and said: Allah's Apostle, I have had a wife and I married another besides her, and my first wife claimed that she had suckled once or twice my newly married wife, thereupon Allah's Apostle (ﷺ) said: One suckling or two do not make the (marriage) unlawful.

Sahih Muslim Book 17, Hadith 24 Next Hadith → Being suckled once or twice, or one suckling or two, do not make marriage unlawful.

Sahih Muslim Book 17, Hadith 26