Ezekiel 33:2-5

2“Son of man, speak to your people and tell them: ‘Suppose I bring the sword against a land, and the people of that land choose a man from among them, appointing him as their watchman, 3and he sees the sword coming against that land and blows the ram’s horn to warn the people.

4Then if anyone hears the sound of the horn but fails to heed the warning, and the sword comes and takes him away, his blood will be on his own head. 5Since he heard the sound of the horn but failed to heed the warning, his blood will be on his own head. If he had heeded the warning, he would have saved his life.