Sahih bukhari Hadith No.146-148 | اللہ نے کیوں پردہ (کا حکم) نازل فرمایا

Asslamoalaikum,
Sahih Bukhari Hadees No. 146-148 Chapter 4, Wudu (Ablution

Hadees No.146
Narrated `Aisha: The wives of the Prophet used to go to Al-Manasi, a vast open place (near Baqi` at Medina) to answer the call of nature at night. `Umar used to say to the Prophet "Let your wives be veiled," but Allah's Apostle did not do so. One night Sauda bint Zam`a the wife of the Prophet went out at `Isha' time and she was a tall lady. `Umar addressed her and said, "I have recognized you, O Sauda." He said so, as he desired eagerly that the verses of Al-Hijab (the observing of veils by the Muslim women) may be revealed. So Allah revealed the verses of "Al-Hijab" (A complete body cover excluding the eyes).
Hadees No.147
Narrated `Aisha: The Prophet said to his wives, "You are allowed to go out to answer the call of nature. "
Hadees No.148
Narrated `Abdullah bin `Umar: I went up to the roof of Hafsa's house for some job and I saw Allah's Apostle answering the call of nature facing Sham (Syria, Jordan, Palestine and Lebanon regarded as one country) with his back towards the Qibla. (See