Amos 3:3-6

3If two people travel together, they have first agreed to meet together.

4If a lion roars in the forest, it means that he has killed an animal to eat. A young lion does not shout unless he has caught something.

5If there is no food in a trap, a bird will not fly into it. If the door of the trap closes, it means that it has caught something.

6Also, if the people in a city hear a trumpet's sound, they become very afraid. If bad trouble comes to a city, it means that the Lord has sent it.