20 Again they answered: “You may not pass through.” Then Edom came out against them with a large and powerful army.

Read Numbers 20:20 Using Other Translations

And he said, Thou shalt not go through. And Edom came out against him with much people, and with a strong hand.
But he said, "You shall not pass through." And Edom came out against them with a large army and with a strong force.
But the king of Edom replied, “Stay out! You may not pass through our land.” With that he mobilized his army and marched out against them with an imposing force.