1 Corinthians 15:15

yea, and we are no better than enthusiastic impostors by affirming that God raised up Christ, when he never did raise him up.

Revelation 22:18-19

"I declare to every one that hears the words of the prophecy of this book, if any one shall add to these things, God shall strike him with the plagues that are written in this book:

Treasury of Scripture Knowledge

Summary

Add thou not unto his words, lest he reprove thee, and thou be found a liar.

Bible References

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Revelation 22:18
"I declare to every one that hears the words of the prophecy of this book, if any one shall add to these things, God shall strike him with the plagues that are written in this book:

And

1 Corinthians 15:15
yea, and we are no better than enthusiastic impostors by affirming that God raised up Christ, when he never did raise him up.