when he sees the sword coming upon the land, if he blows the trumpet and warns the people,
Ezekiel 33:3
Surrounding context
33:2 "Son of man, speak to the children of your people, and say to them: "When I bring the sword upon a land, and the people of the land take a man from their territory and make him their watchman,
33:3 when he sees the sword coming upon the land, if he blows the trumpet and warns the people,
33:4 then whoever hears the sound of the trumpet and does not take warning, if the sword comes and takes him away, his blood shall be on his own head.