Chapter 19: The Book of Divorce
Ayyub reported a hadith like this with the same chain of narrators and he said: Umar (Allah be pleased with him) asked Allah' s Apostle (ﷺ) about it and he commanded him that he should take her back until she is divorced in the state of purity without having a sexual intercourse with her, and said: Divorce her in the beginning of her 'Idda or her 'Idda commences.
Sahih Muslim 1471l