Musannaf Ibn Abi Shayba 35:90

'Isa ibn Yunus narrated to us, from 'Umar ibn Sa'id ibn Abi Husayn, who said: Ibn Abi Mulayka narrated to us, who said: 'Uqba ibn al-Harith narrated to us, saying: I married the daughter of Abu Ihab al-Tamimi. When it was the morning after the consummation of the marriage, a slave woman of the people of Mecca came and said: "I have indeed suckled both of you." 'Uqba rode to the Prophet, may Allah bless him and grant him peace, in Medina and mentioned that to him. He said: "I asked the girl's family, and they denied it." He (the Prophet) said: "And how [can you keep her] when it has been said?" So he separated from her, and she married someone else.