Hadith.4486 - Al-Bazanti narrated from Al-Mashriqi, who said
I asked Abu Al-Hasan (as): What do you say about a man who claimed that he proposed to a woman, and jokingly, she married herself to him while also joking? Then the woman was asked about this, and she said: "Yes."
Imam (as) said: "It is nothing."
I asked: Is it permissible for the man to marry her?
Imam (as) said: "Yes."