The Church is not nearly as concerned with our physical sleep as we are. Tertullian (c. 160-225) was once asked by a woman if she should stay married to her non-believing husband. Tertullian asked her if he was respectful of her faith and whether he allowed her to do the midnight prayers. Back in the day people stayed awake to pray. For many people just the mention of prayer at night is like a glass of warm milk. But, what the Church and her scriptures are concerned about is spiritual slumber and spiritual sleepiness. We are told to Wake Up. It is later than we think. It is time to pray, fast and give alms. And it is time to embrace Watchfulness.
Then He said to them, “My soul is exceedingly sorrowful, even to death. Stay here and watch.” Mark 14:34
And going a little farther, he fell on the ground and prayed that, if it were possible, the hour might pass from him. And he said, “Abba, Father, all things are possible to thee; remove this cup from me; yet not what I will, but what thou wilt.” And he came and found them sleeping, and he said to Peter, “Simon, are you asleep? Could you not watch one hour? Watch and pray that you may not enter into temptation; the spirit indeed is willing, but the flesh is weak.” And again he went away and prayed, saying the same words. And again he came and found them sleeping, for their eyes were very heavy; and they did not know what to answer him. And he came the third time, and said to them, “Are you still sleeping and taking your rest? It is enough; the hour has come; the Son of man is betrayed into the hands of sinners. Mark 14:35-41
Take heed, watch; for you do not know when the time will come. It is like a man going on a journey, when he leaves home and puts his servants in charge, each with his work, and commands the doorkeeper to be on the watch. Watch therefore — for you do not know when the master of the house will come, in the evening, or at midnight, or at cockcrow, or in the morning lest he come suddenly and find you asleep. And what I say to you I say to all: Watch. Mark 13:33-37
Awake, you who sleep, Arise from the dead, And Christ will give you light. Ephesians 5:14
Love not sleep, lest you come to poverty; open your eyes, and you will have plenty of bread. Proverbs 20:13
How long will you lie there, O sluggard? When will you arise from your sleep Proverbs 6:9
A little sleep, a little slumber, a little folding of the hands to rest, and poverty will come upon you like a robber and want like an armed man Proverbs 24:33-34