Because Israel
ZEFANIABIBLE_BIBLE_BOOK_NAME_4 21:24-26
24
Israel struck him with the sword and took possession of his land from the Arnon to the Jabbok, [but only up] to the Ammonite border, because it was fortified.
25
Israel took all the cities and lived in all these Amorite cities, including Heshbon and all its villages.
26
Heshbon was the city of Sihon king of the Amorites, who had fought against the former king of Moab and had taken control of all his land as far as the Arnon.
ZEFANIABIBLE_BIBLE_BOOK_NAME_20 19:5
A false witness will not go unpunished, and one who utters lies will not escape.
ZEFANIABIBLE_BIBLE_BOOK_NAME_20 19:9
A false witness will not go unpunished, and one who utters lies perishes.
Jabbok
ZEFANIABIBLE_BIBLE_BOOK_NAME_1 32:22
During the night Jacob got up and took his two wives, his two female slaves, and his 11 sons, and crossed the ford of Jabbok.
ZEFANIABIBLE_BIBLE_BOOK_NAME_5 2:37
But you did not go near the Ammonites' land, all along the bank of the Jabbok River and the cities of the hill country, everything that the LORD our God had commanded.
ZEFANIABIBLE_BIBLE_BOOK_NAME_5 3:16
and I gave to the Reubenites and Gadites [the area extending] from Gilead to the Arnon Valley (the middle of the valley was the border) and up to the Jabbok River, the border of the Ammonites.