Amos 2:3

“And I will cut off the judge from the midst thereof, etc.] Either from the midst of Moab, the country in general; or from Kerioth in particular, so Kimchi; meaning their principal governor, their king, as Aben Ezra; for kings sometimes have acted as judges, took the bench, and sat and administered justice to their subjects: and I will stay all the princes thereof with him, saith the Lord; the king, and the princes of the blood, and his nobles; so that there should be none to succeed him, or to protect and defend the people; the destruction should be an entire one, and inevitable, for the mouth of the Lord had spoken it. This was fulfilled at the same time as the prophecy against the children…”

“the judge--the chief magistrate, the supreme source of justice. "King" not being used, it seems likely a change of government had before this time substituted for kings, supreme judges.”

“And I will cut off the judge - The title “judge” (shophet) is nowhere used absolutely of a king. Holy Scripture speaks in several places of “all the judges of the earth” Job 9:24; Psalms 2:10; Psalms 148:11; Proverbs 8:16; Isaiah 40:23. Hosea Hosea 13:10, under “judges,” includes “kings and princes,” as judging the people. The word “judge” is always used as one invested with the highest, but not regal authority, as of all the judges from the death of Joshua to Samuel. In like way it (Sufetes) was the title of the chief magistrates of Carthage , with much the same authority as the Roman Consuls . The Phoenician histories, although they would not own that Nebuchadnezzar conquered Tyre, still…”

“The judge - The governor that is, every one of them. Amos 2:4”

“Num 24:17; Jer 48:7, Jer 48:25 Amos 2:4”