The Messenger of Allah ﷺ said, "A single suckling or two does not establish the prohibition of marriage."
قال رسول الله ﷺ: لا تحرم المصة والمصتان.
No references are available.
Muslim reported it in "Rida" (1450) via Ayub, from Ibn Abu Mulayka, from Abdullah bin Zubayr, from Ayesha, who said, "I mentioned it."