24:30An-Noor

"We went with Allah's Messenger, while we were young men who had nothing. He said: 'O young men! You should marry, for indeed it helps in lowering the gaze and protecting the private parts. Whoever among you is not able to marry, then let him fast, for indeed fasting will diminish his sexual desire."

I heard the Messenger of Allah (ﷺ) say: One of you who believes in Allah and in the Last Day should not raise her head until the men raise their heads (after prostration) lest they should see the private parts of men.

I said: Messenger of Allah, from whom should we conceal our private parts and to whom can we show? He replied: conceal your private parts except from your wife and from whom your right hands possess (slave-girls). I then asked: Messenger of Allah, (what should we do), if the people are assembled together? He replied: If it is within your power that no one looks at it, then no one should look at it. I then asked: Messenger of Allah if one of us is alone, (what should he do)? He replied: Allah is more entitled than people that bashfulness should be shown to him.

The verse: "And say to the believing women that they should lower gaze was partly abrogated by the verse: "Such elderly women as are past the prospect of marriage."

The Messenger of Allah (ﷺ) saw a man washing in a public place without a lower garment. So he mounted the pulpit, praised and extolled Allah and said: Allah is characterised by modesty and concealment. So when any of you washes, he should conceal himself.