'Warnings' in the Bible

Now these things [the warnings and admonitions] took place as examples for us, so that we would not crave evil things as they did.

In conclusion, my brethren, be joyful in the Lord. For me to give you the same warnings as before is not irksome to me, while so far as you are concerned it is a safe precaution.

Reject a divisive person after one or two warnings.

See to it that you do not refuse [to listen to] Him who is speaking [to you now]. For if those [sons of Israel] did not escape when they refused [to listen to] him who warned them on earth [revealing God’s will], how much less will we escape if we turn our backs on Him who warns from heaven?

“And behold, I am coming quickly. Blessed (happy, prosperous, to be admired) is the one who heeds and takes to heart and remembers the words of the prophecy [that is, the predictions, consolations, and warnings] contained in this book (scroll).”

and if anyone takes away from or distorts the words of the book of this prophecy, God will take away [from that one] his share from the tree of life and from the holy city (new Jerusalem), which are written in this book.