John 15:4-6
"Abide in me, and I in you. Just as the branch cannot bear fruit of itself except it abide in the vine, no more can you, unless you abide in me.
Acts 11:23
When he arrived, and saw the grace of God, he was glad, and he encouraged them all to remain faithful to the Lord, with full purpose of heart;
Acts 27:31
Paul said to the centurion and to the soldiers, "Unless these men remain on the ship, you cannot be saved."
Hebrews 3:14
For we are become comrades of the Christ, if we hold our first title deed firm until the very end.
Hebrews 6:4-8
For in the case of those who have been once for all enlightened and have tasted of the heavenly gift,
Hebrews 9:11-12
But when Christ came, a High Priest of good things to come, he passed through the greater and more perfect tent not made with hands, that is to say, not of this material creation,
Hebrews 9:15-17
And because of this he is the Mediator of a new testament, in order that, since a death has taken place to atone for offenses committed under the first testament, those who have been called may receive the promise of the eternal inheritance.
Hebrews 10:26-30
For if we sin wilfully, after we have received the knowledge of the truth, there no longer remains any other sacrifice for sins,
Hebrews 10:39
"But we are not of defections unto perdition, but of faith unto the gaining of the soul."