In the valley; or, the valley, which might be called Bamoth, not because it was a place naturally high, but from divers other reasons, which may be easily guessed. Or, to the valley, or to that valley, that famous or rather infamous valley, to wit, of Abel-shittim, Numbers 33:49, where they committed those foul abominations recorded Num 25 Pisgah was the top of these high hills of Abarim; of which see Deuteronomy 3:17,27 Deuteronomy 32:49 34:1,6.
Related Commentaries of Numbers 21:20
Numbers 21:20
20 And from Bamoth in the valley, that is in the countrye of Moab, to the top of Pisgah, which looketh toward Jeshimon.