And one day, the Prophet (sallal-laahu-alayhi-wasallam) said to Umar Bin Abee Salama,– whilst he was a boy under the guardianship of the prophet (sallal-laahu-alayhi-wasallam), because the prophet married his mother after the death of Abee Salama and this boy was under his guardianship–; so when food was presented, the prophet (sallal-laahu-alayhi-wasallam) said to him, ‘’O boy! Mention the Name of Allaah, eat with your right hand and eat of the dish what is nearer to you’’. This was guidance from the prophet (sallal-laahu-alayhi-wasallam) to this boy.
And he (sallal-laahu-alayhi-wasallam) said in general to all the young men: ‘’O young people! Whoever among you is able to marry, should marry, because it helps him lower his gaze and guard his modesty, and whoever is not able to marry, should fast, fasting will diminish his sexual power’’.
So, the Prophet (sallal-laahu-alayhi-wasallam) commanded the young men to guard their modesty, either through marriage if they are able or through adopting measures that would weaken and diminish desires, fearing that they will be put to trial and out of concern for his ummah. This is an advice of the prophet (sallal-laahu-alayhi-wasallam) to the young men until the establishment of the hour and it is obligatory upon them to cling to it.
And he (sallal-laahu-alayhi-wasallam) said: ‘’Amongst the seven whom Allaah will protect with His Shade on the day when there would be no shade but His Shade, is a young man who grew up in the worship of Allaah’’
If he (i.e. the young man) grew up in the worship of Allaah, and was not overtaken by youthful excitement and the whims that lead the youth towards sin, rather he overcame that through obedience to Allaah, he will receive this honour on the day of judgement. Allaah will provide him with shade on that day of severe heat when the sun will be brought close. (On the) day when the people are drenched in sweat, Allaah will provide a group of people amongst mankind with Shade and included amongst them will be young man who grew up in the worship of Allaah.