Ezekiel 33:3 in the King James Version
If when he seeth the sword come upon the land, he blow the trumpet, and warn the people;
Context
2 “Son of man, speak to the children of your people, and tell them, ‘When I bring the sword on a land, and the people of the land take a man from among them, and set him for their watchman,
3 if, when he sees the sword come on the land, he blows the trumpet and warns the people,
4 then whoever hears the sound of the trumpet and doesn’t heed the warning, if the sword comes and takes him away, his blood will be on his own head.