βεβαίωσις

Philippians 1:7 βεβαιώσει in confirmation

It is right for me to feel this way about all of you, since I have you in my heart. For in my chains and in my defense and confirmation of the gospel, you are all partners in grace with me.

Hebrews 6:16 βεβαίωσιν confirmation

Men swear by someone greater than themselves, and their oath serves as a confirmation to end all argument.