Because Israel
Numbers 21:24-26
24
And Israel smiteth him by the mouth of the sword, and possesseth his land from Arnon unto Jabbok -- unto the sons of Ammon; for the border of the sons of Ammon [is] strong.
25
And Israel taketh all these cities, and Israel dwelleth in all the cities of the Amorite, in Heshbon, and in all its villages;
26
for Heshbon is a city of Sihon king of the Amorite, and he hath fought against the former king of Moab, and taketh all his land out of his hand, unto Arnon;
Proverbs 19:5
A false witness is not acquitted, Whoso breatheth out lies is not delivered.
Proverbs 19:9
A false witness is not acquitted, And whoso breatheth out lies perisheth.
Jabbok
Genesis 32:22
And he riseth in that night, and taketh his two wives, and his two maid-servants, and his eleven children, and passeth over the passage of Jabbok;
Deuteronomy 2:37
'Only, unto the land of the sons of Ammon thou hast not drawn near, any part of the brook Jabbok, and cities of the hill-country, and anything which Jehovah our God hath [not] commanded.
Deuteronomy 3:16
'And to the Reubenite and to the Gadite I have given from Gilead even unto the brook Arnon, the middle of the valley and the border, even unto Jabbok the brook, the border of the sons of Ammon,