The Prophet ﷺ said, "A single suckling or two does not establish the prohibition of marriage through breastfeeding."
أن النبي ﷺ: لا يحرم من الرضاعة المصة والمصتان.
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Reported by Nasai (3309), Ahmad (16110), Abdul-Razzaq (7/469), Bayhaqi (7/454), and Marwazi in Sunnah (279-280-283), all of them through various routes from Urwa bin Zubayr, from his brother Abdullah bin Zubayr, and he related it. Its chain of transmission is sahih.Abdullah bin Zubayr met the Prophet ﷺ when he was nine years old, as Shafii stated, and in Shafii's statement there is an indication of the soundness of Abdullah bin Zubayr's narration. Ibn Hibban also pointed to this, saying, "I do not deny that Ibn Zubayr heard this report from the Prophet ﷺ, so at one time he related what he had heard, and at another time he narrated from Ayesha, and this is something well established among the companions."Bayhaqi said, after quoting Shafii's statement, "It is as he said, except that Ibn Zubayr took this hadith from Ayesha, from the Prophet ﷺ." Sunan al-Kubra (7/454). And it is as he said, for the citation of Muslim's narration of it through the route of Ibn Abu Mulayka, from Abdullah bin Zubayr, from Ayesha, has already preceded.Bayhaqi also reported it through the route of Muhammad bin Ishaq, who said, Abu Ubayd narrated to us, who said, Yahya bin Saeed narrated to us, from Hisham bin Urwa, from his father, from Ibn Zubayr, from Ayesha.As for what Muhammad bin Dinar Tahi reported, from Hisham bin Urwa, from his father, from Abdullah bin Zubayr, from Zubayr, adding "Zubayr" in it, this is an error. Ibn Hibban reported it in his Sahih (4226) through his route, and Bukhari noted in Ilal al-Kabir (1/454) that Muhammad bin Dinar erred in it by adding "Zubayr" to the chain of transmission. Tirmidhi likewise said this in his Sunan (1150) when citing the hadith of Ibn Abu Mulayka, from Abdullah bin Zubayr, from Ayesha.