Assurance: Paul
Source: TTT
2 Timothy 1:12
For this reason, even though I suffer as I do, I am not ashamed; for I know whom I have believed, and I am convinced that He is able to guard what I have entrusted to Him for that day.
2 Timothy 4:18
And the Lord will rescue me from every evil action and bring me safely into His heavenly kingdom. To Him be the glory forever and ever. Amen.