Numbers 21:23
"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."
Cross References (ranked by relevance)
But Sihon trusted not Israel to pass through his coast: but Sihon gathered all his people together, and pitched in Jahaz, and fought against Israel.
And Heshbon shall cry, and Elealeh: their voice shall be heard even unto Jahaz: therefore the armed soldiers of Moab shall cry out; his life shall be grievous unto him.
Thus Edom refused to give Israel passage through his border: wherefore Israel turned away from him.
From the cry of Heshbon even unto Elealeh, and even unto Jahaz, have they uttered their voice, from Zoar even unto Horonaim, as an heifer of three years old: for the waters also of Nimrim shall be desolate.