2 Peter 1 Warnings about failing away
(10) So then, my brothers, be all the more eager to make your calling and election certain, for if you keep on doing this you will never fail.
(11) For in this way you will be generously granted entry into the eternal kingdom of our Lord and Savior Jesus, the Messiah.
(12) Therefore, I intend to keep on reminding you about these things, even though you already know them and are firmly established in the truth that you now have.
Heb 6 Once was saved, but no more
(4) For it is impossible to keep on restoring to repentance time and again people who have once been enlightened, who have tasted the heavenly gift, who have become partners with the Holy Spirit,
(5) who have tasted the goodness of God's word and the powers of the coming age,
(6) and who have fallen away, as long as they continue to crucify the Son of God to their own detriment by exposing him to public ridicule.
Joh 15 Believers cast into the fire
(1) Jesus said to his disciples: I am the true vine, and my Father is the gardener.
(2) He cuts away every branch of mine that doesn't produce fruit. But he trims clean every branch that does produce fruit, so that it will produce even more fruit.
(3) You are already clean because of what I have said to you.
(4) Stay joined to me, and I will stay joined to you. Just as a branch cannot produce fruit unless it stays joined to the vine, you cannot produce fruit unless you stay joined to me.
(5) I am the vine, and you are the branches. If you stay joined to me, and I stay joined to you, then you will produce lots of fruit. But you cannot do anything without me.
(6) If you don't stay joined to me, you will be thrown away. You will be like dry branches that are gathered up and burned in a fire.
Rom 11 Keep trusting or you will be cut off
(17) You Gentiles are like branches of a wild olive tree that were made to be part of a cultivated olive tree. You have taken the place of some branches that were cut away from it. And because of this, you enjoy the blessings that come from being part of that cultivated tree.
(18) But don't think you are better than the branches that were cut away. Just remember that you are not supporting the roots of that tree. Its roots are supporting you.
(19) Maybe you think those branches were cut away, so that you could be put in their place.
(20) That's true enough. But they were cut away because they did not have faith, and you are where you are because you do have faith. So don't be proud, but be afraid.
(21) If God cut away those natural branches, couldn't he do the same to you?
(22) Now you see both how kind and how hard God can be. He was hard on those who fell, but he was kind to you. And he will keep on being kind to you, if you keep on trusting in his kindness. Otherwise, you will be cut away too.
Mat 24 Warning about loosing faith
(13) But if you keep on being faithful right to the end, you will be saved.
Rev 2 Salvation is conditional on remaining faithful to the end
(10) Don't worry about what you will suffer. The devil will throw some of you into jail, and you will be tested and made to suffer for ten days. But if you are faithful until you die, I will reward you with a glorious life.
1Co 9 Paul worries about being castaway
(27) But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway.