It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that when he divorced his wife, Sayyiduna Umar (may Allah be pleased with him) mentioned this to the Noble Prophet (peace and blessings of Allah be upon him). He (peace be upon him) said: "Tell him to take his wife back (i.e., to revoke the divorce), then if he wishes, he may divorce her while she is in a state of purity." Imam Darimi (may Allah have mercy on him) said: Ibn al-Mubarak and Waki‘ narrated that it was in the state of pregnancy. (That is, either divorce her in a state of purity, or if the woman is pregnant, then divorce her at that time.)