'Warning' in the Bible

Son of man, I have made thee a watchman unto the house of Israel: therefore hear the word at my mouth, and give them warning from me.

When I say unto the wicked, Thou shalt surely die; and thou givest him not warning, nor speakest to warn the wicked from his wicked way, to save his life; the same wicked man shall die in his iniquity; but his blood will I require at thine hand.

Again, When a righteous man doth turn from his righteousness, and commit iniquity, and I lay a stumblingblock before him, he shall die: because thou hast not given him warning, he shall die in his sin, and his righteousness which he hath done shall not be remembered; but his blood will I require at thine hand.

But if you warn the righteous person that he should not sin, and he does not sin, he will indeed live because he listened to your warning, and you will have saved your life.”

So you will be a disgrace and a taunt, a warning and a horror, to the nations around you when I execute judgments against you in anger, wrath, and furious rebukes. I, Yahweh, have spoken.

Then whosoever heareth the sound of the trumpet, and taketh not warning; if the sword come, and take him away, his blood shall be upon his own head.

He heard the sound of the trumpet, and took not warning; his blood shall be upon him. But he that taketh warning shall deliver his soul.

If that sentinel notices that violence is approaching, but does not sound an alarm, then because the nation does not take warning and the sword arrives and destroys their lives because of their guilt, I'll seek retribution for their shed blood from the one who was acting as sentinel.'"

“As for you, son of man, I have made you a watchman for the house of Israel. When you hear a word from My mouth, give them a warning from Me.