Qatadah (may Allah have mercy on him) said that Sayyiduna Abu Dharr and Sayyidah Aishah (may Allah be pleased with them both) said: After the period has passed, the one who took the oath will be made to stand: either he takes her back or he divorces her.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الإيلاء / 15221