Some places in Scripture work like pins on a map, and Ashdoth-pisgah is one. Deuteronomy 3 uses it to mark the far edge of the land Moses had just given away, “the plain also, and Jordan”, running down to the salt sea “under Ashdothpisgah eastward.” Joshua 12 and 13 repeat the same landmark when listing the territory east of the Jordan. Deuteronomy 4 refers to “the springs of Pisgah” in the same breath. It is a boundary marker, nothing more. To see how it fits, start with the Moses speech in Deuteronomy 3.
4 verses
The plain also, and Jordan, and the coast thereof, from Chinnereth even unto the sea of the plain, even the salt sea, under Ashdothpisgah eastward.
And all the plain on this side Jordan eastward, even unto the sea of the plain, under the springs of Pisgah.
And from the plain to the sea of Chinneroth on the east, and unto the sea of the plain, even the salt sea on the east, the way to Bethjeshimoth; and from the south, under Ashdothpisgah:
And Bethpeor, and Ashdothpisgah, and Bethjeshimoth,
Matthew George Easton, 1897
(Deut. 3:17; Josh. 12:3; 13:20) in Authorized Version, but in Revised Version translated “slopes of Pisgah.” In Deut. 4:49 it is translated in the Authorized Version “springs of Pisgah.” The name Ashdoth is translated “springs” in the Authorized Version, but “slopes” in the Revised Version, of Josh. 10:40 and 12:8. It has been identified with the springs under Mount Nebo, now called ‘Ayun Musa.
William Smith, 1884
(3:17; Joshua 12:3; 13:20) and in Deuteronomy 4:49 Authorized Version, translated springs of Pisgah , i.e. a valley or fountain near Mount Pisgah.