Quran Chapter 74:verses 1-7:
“O you (Muhammad(SAW)) enveloped (in garments)! Arise and warn! And your Lord (Allah) magnify! And your garments purify! And keep away from the idols. And give not a thing in order to have more (or consider not your deeds of Allah’s obedience as a favour to Allah). And be patient for the sake of your Lord (i.e. perform your duty to Allah)!”
“These verses suggest
that to live to oneself is quite easy, but it has been decided that you have to shoulder this heavy burden; consequently sleep, comfort, and a warm bed are items decreed to be alien in your lexicon of life. O Muhammad, arise quickly for the strife and toil awaiting you; no time is there for sleep and such amenities; grave responsibilities have been divinely determined to fall to your lot, and drive you into the turmoil of life to develop a new sort of precarious affinity with the conscience of people and reality of life.” -Excerpt from The Sealed Nectar, Biography of the Prophet(SAW)