Numbers 20:18-21

18But Edom said to him, "You shall not pass through, lest I come out with the sword against you."

19And the people of Israel said to him, "We will go up by the highway, and if we drink of your water, I and my livestock, then I will pay for it. Let me only pass through on foot, nothing more."

20But he said, "You shall not pass through." And Edom came out against them with a large army and with a strong force.

21Thus Edom refused to give Israel passage through his territory, so Israel turned away from him.