Strong’s Greek
G803 — asphaleia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀσφάλεια
asphaleia — pronounced as-fal'-i-ah
from 804; security (literally or figuratively):--certainty, safety. see GREEK for 804
3 occurrences in the KJV.
Luke 1:4
That thou mightest know the certainty of those things, wherein thou hast been instructed.
Acts 5:23
Saying, The prison truly found we shut with all safety, and the keepers standing without before the doors: but when we had opened, we found no man within.
1 Thessalonians 5:3
For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.