23 But Sihon would not let Israel pass through his territory. He mustered his entire army and marched out into the wilderness against Israel. When he reached Jahaz, he fought with Israel.

Read Numbers 21:23 Using Other Translations

And Sihon would not suffer Israel to pass through his border: but Sihon gathered all his people together, and went out against Israel into the wilderness: and he came to Jahaz, and fought against Israel.
But Sihon would not allow Israel to pass through his territory. He gathered all his people together and went out against Israel to the wilderness and came to Jahaz and fought against Israel.
But King Sihon refused to let them cross his territory. Instead, he mobilized his entire army and attacked Israel in the wilderness, engaging them in battle at Jahaz.