Ikrimah narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the paternal aunt of Abdullah bin al-Harith accepted Islam, emigrated, and then married. Her husband had accepted Islam before her, so the Messenger of Allah (peace and blessings be upon him) returned her to the first husband.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14073