John 10:28-30
and I give them eternal life; they will never perish, and no one will snatch them out of my hand.
John 21:17
For the third time he asked him, "Simon, son of John, do you love me?" Now Peter was vexed at being asked a third time, "Do you love me?" So he replied; "Lord, you know everything, you can see I love you." Jesus said, "Then feed my sheep.
2 Corinthians 1:12
My proud boast is the testimony of my conscience that holiness and godly sincerity, not worldly cunning but the grace of God, have marked my conduct in the outside world and in particular my relations with you.
1 Thessalonians 2:10
You are witnesses, and so is God, to our behaviour among you believers, how pious and upright and blameless it was,