Strong’s Greek
G1773 — ennuchon
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἔννυχος
ennuchon — pronounced en'-noo-khon
neuter of a compound of 1722 and 3571; (adverbially) by night:--before day. see GREEK for 1722 see GREEK for 3571
1 occurrence in the KJV.
Mark 1:35
And in the morning, rising up a great while before day, he went out, and departed into a solitary place, and there prayed.