Hebrews 2:3

2:3 how will we escape if we neglect such a great salvation? It was first communicated through the Lord and was confirmed to us by those who heard him,

Hebrews 6:9

6:9 But in your case, dear friends, even though we speak like this, we are convinced of better things relating to salvation.

Hebrews 13:18

13:18 Pray for us, for we are sure that we have a clear conscience and desire to conduct ourselves rightly in every respect.