Deuteronomy 2:17-19

that Jehovah spake unto me, saying, Thou art this day to pass over Ar, the border of Moab: and when thou comest nigh over against the children of Ammon, vex them not, nor contend with them; for I will not give thee of the land of the children of Ammon for a possession; because I have given it unto the children of Lot for a possession.