Umar came out from the masjid and with him was al-Jarud al-Abdi. There was a woman on the main road. Umar greeted her. She answered (his greeting) and (then) said: Be off, O Umar! I have seen you (when you were) called Umayr (lttle Umar) in the marketplace of Ukaz, tending the sheep with your stick. Then the days passed and you were called Umar. Then the days passed and (now) you are called Commander of the Believers. So, be wary of God in respect of the subjects (whom you govern). And she continued advising him. Then al-Jarud said: Woman, you have said a lot to the Commander of the Believers. Umar said: Let her be. Do you not know her? This is Khawlah bint Hakim, the wife of Ubayd ibn al-Samit, whose word was heard by Allah from above the seven heavens.*
So it is most fitting for Umar to listen to her.
Ibn Abd al-Barr, al-Isti’ab
*The Caliph is here alluding to the sending down of the opening verses of al-Mujadalah