Ezekiel 33:2-5

2"Son of man, speak to your people and say to them, If I bring the sword upon a land, and the people of the land take a man from among them, and make him their watchman,

3and if he sees the sword coming upon the land and blows the trumpet and warns the people,

4then if anyone who hears the sound of the trumpet does not take warning, and the sword comes and takes him away, his blood shall be upon his own head.

5He heard the sound of the trumpet and did not take warning; his blood shall be upon himself. But if he had taken warning, he would have saved his life.