G2178 — ephapax
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ephapax — pronounced ef-ap'-ax
from 1909 and 530; upon one occasion (only):--(at) once (for all). see GREEK for 1909 see GREEK for 530
5 occurrences in the KJV.
Romans 6:10
For in that he died, he died unto sin once: but in that he liveth, he liveth unto God.
1 Corinthians 15:6
After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep.
Hebrews 7:27
Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people’s: for this he did once, when he offered up himself.
Hebrews 9:12
Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.
Hebrews 10:10
By the which will we are sanctified through the offering of the body of Jesus Christ once for all.