King James Version
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.English Standard Version
He 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.New International Version
Since he heard the sound of the trumpet but did not take warning, his blood will be on his own head. If he had taken warning, he would have saved himself.