Abd al-Rahman bin al-Qasim bin Muhammad narrates from his father that Sayyidah Aishah (may Allah be pleased with her) used to say about the one who takes an oath of ila: Nothing is due from him, even if a year passes; either he takes her back or he divorces her.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الإيلاء / 15220