Musannaf Ibn Abi Shayba 7:345

Ghundar narrated to us, from Shu'bah, from Mughirah, from Ibrahim, from Abu al-Sha'tha', from Alqama and the companions of Abdullah, that they said regarding a man if he takes an oath (ila') against his wife, then he comes to her before he fulfills his oath: He shall offer expiation for his oath.