Strong’s Greek
G951 — bebaiosis
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
βεβαίωσις
bebaiosis — pronounced beb-ah'-yo-sis
from 950; stabiliment:--confirmation. see GREEK for 950
2 occurrences in the KJV.
Philippians 1:7
Even as it is meet for me to think this of you all, because I have you in my heart; inasmuch as both in my bonds, and in the defence and confirmation of the gospel, ye all are partakers of my grace.
Hebrews 6:16
For men verily swear by the greater: and an oath for confirmation is to them an end of all strife.