"Narrated 'Aisha the wife of the Prophet: 'Umar bin Al-Khattab used to say to Allah's Apostle "Veil your wives." But he did not. The wives of the Prophet used to go out to answer the call of nature at night only at Al-Manasi'. Once Sauda, the daughter of Zam'a went out and she was a tall woman. 'Umar bin Al-Khattab saw her while he was in a gathering, and said, "We recognise you, O Sauda!" 'Umar was eager that Allah might reveal the order for the veiling of women. So Allah revealed the Verse of veiling."