The sleep of a laboring man is sweet, whether he eat little or much...Ecclesiastes 5.12

I will both lay me down in peace and sleep; for thou, Lord, only makest me dwell in safety. Psalms 4.8

My son, keep thy father's commandment, and forsake not the law of thy mother: Bind them continually upon thine heart, and tie them about thy neck. When thou goest, it shall lead thee; when thou sleepest, it shall keep thee; and when thou awakest, it shall talk with thee; For the commandment is a lamp , and the law is light, and reproofs of instruction are the way of life, to keep thee from the evil woman, from the flattery of the tongue of a strange woman. Proverbs 6.20-24

It is vain for you to rise up early, to sit up late, to eat the bread of sorrows; for so he giveth his beloved sleep. Psalms 127.2