Numbers 21:23

23 aBut 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 bcame to Jahaz and fought against Israel.

Isaiah 15:4

4 cHeshbon and dElealeh cry out;
their voice is heard as far as eJahaz;
therefore the armed men of Moab cry aloud;
his soul trembles.
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