Proverbs 3:24 English Standard Version (ESV)
24 If you lie down, you will not be afraid;
when you lie down, your sleep will be sweet.
Psalm 4:8 English Standard Version (ESV)
8 In peace I will both lie down and sleep;
for you alone, O Lord, make me dwell in safety.
Psalm 127:2 English Standard Version (ESV)
2 It is in vain that you rise up early
and go late to rest,
eating the bread of anxious toil;
for he gives to his beloved sleep.
...to his beloved sleep. Go to bed with enthusiasm and great joy, for it is a gift of God's grace.