Strong’s Greek
G879 — aphupnoo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀφυπνόω
aphupnoo — pronounced af-oop-no'-o
from a compound of 575 and 5258; properly, to become awake, i.e. (by implication) to drop (off) in slumber:--fall asleep. see GREEK for 575 see GREEK for 5258
1 occurrence in the KJV.
Luke 8:23
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.