Aisha reported that the wives of Allahs Messenger ﷺ used to go out in the cover of night when they went to open fields (in the outskirts of Madinah) for easing themselves. Umar b Khattab used to say: Allahs Messenger, ask your ladies to observe veil, but Allahs Messenger ﷺ did not do that. So there went out Sauda, daughter of Zarna, the wife of Allahs Messenger ﷺ , during one of the nights when it was dark. She was a tall statured lady. Umar called her saying: Sauda, we recognise you. (He did this with the hope that the verses pertaining to veil would be revealed.) Aisha said: Allah, the Exalted and Glorious, then revealed the verses pertaining to veil.