Proverbs 3:24English Standard Version (ESV)
24 If you lie down, you will not be afraid;
when you lie down, your sleep will be sweet.
Psalm 4:8English Standard Version (ESV)
8 In peace I will both lie down and sleep;
for you alone, O Lord, make me dwell in safety.
Psalm 127:2English 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.
Psalm 42:8New International Version (NIV)
8 By day the Lord directs his love,
at night his song is with me—
a prayer to the God of my life.
I think drawn to lullabies, because sleep is often elusive. Pain will disrupt it so that I can't recall the last time I slept like a baby. My God, who never sleeps, keeps watch over my nights, and I am thankful for his presence. Sleep well, beloved of God, He gives you a song in the night.
Lullaby - JJ Heller