BaMidbar 21:13

Verse 13. And thence into free natural delight, by which the other side of Arnon, which is in the wilderness, that comes out of the border of the Amorites: for Arnon is the border of Moab, between Moab and the Amorites. ultimate truth and good are vitiated, and consequently into the obscurity of evil and falsity derived from it. For the truth of the Word perverted by adulterated good is the limit between that good and actual evil.