From God
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. (Psalm 127:2)
Of the sluggard (very lazy person)
How long wilt thou sleep, O sluggard? when wilt thou arise out of thy sleep? Yet a little sleep, a little slumber, a little folding of the hands to sleep: (Proverbs 6:9-10)
Of Jesus
And, behold, there arose a great tempest in the sea, insomuch that the ship was covered with the waves: but he was asleep. (Matthew 8:24)
And he was in the hinder part of the ship, asleep on a pillow: and they awake him, and say unto him, Master, carest thou not that we perish? (Mark 4:38)
But as they sailed he fell asleep: and there came down a storm of wind on the lake; and they were filled with water, and were in jeopardy. (Luke 8:23)
A symbol of death
So man lieth down, and riseth not: till the heavens be no more, they shall not awake, nor be raised out of their sleep. (Job 14:12)
He said unto them, Give place: for the maid is not dead, but sleepeth. And they laughed him to scorn. (Matthew 9:24)
And when he was come in, he saith unto them, Why make ye this ado, and weep? the damsel is not dead, but sleepeth. (Mark 5:39)
And all wept, and bewailed her: but he said, Weep not; she is not dead, but sleepeth. (Luke 8:52)
These things said he: and after that he saith unto them, Our friend Lazarus sleepeth; but I go, that I may awake him out of sleep. Then said his disciples, Lord, if he sleep, he shall do well. (John 11:11-12)
For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him. (1 Thessalonians 4:14)
See DEATH