Abu Umamah bin Sahl bin Hunayf narrates from his father: Then the Messenger of Allah (peace and blessings be upon him) married Zaynab bint Jahsh (may Allah be pleased with her), and before him she had been married to Zayd bin Harithah (may Allah be pleased with him).
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20474