It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that Abu Ayyub (may Allah be pleased with him) intended to divorce Umm Ayyub (may Allah be pleased with her), so the Messenger of Allah (peace and blessings be upon him) said: "O Abu Ayyub! Divorcing Umm Ayyub is a sin."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21790