Galatians 3:4

Have you gone through so much, all for nothing???f it really is for nothing!

2 John 1:8

Look out for yourselves, take care not to lose what we have worked for, but make sure that you are paid for it in full.

1 Corinthians 15:2

and through which you are to be saved, if you hold on, unless your faith has been all for nothing.

Hebrews 6:4-6

For it is impossible to arouse people to a fresh repentance when they have once for all come into the light and had a taste of the gift from heaven, and shared in the holy Spirit

Hebrews 10:32-39

But you must remember those early days when after you had received the light you had to go through a great struggle with persecution,

2 Peter 2:20-22

For if after men have escaped the corrupting influences of the world through the knowledge of the Lord and Savior Jesus Christ, they again become entangled in them and are overcome by them, their final condition is worse than their former one.

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