Musannaf Ibn Abi Shayba 9:672

Waki’ narrated to us, from Isra’il, from Jabir, from ‘Amir, regarding a man who wrote to him or to his master to marry him off, so he married him off, then he (the man) came and denied it. Al-Sha’bi said: If the husband ratifies the marriage, then it is valid. If he does not ratify it, then it is nothing, and there is no dowry upon either of them if he had not entered upon her.