and he appointed his own priests for the high places and for the goat idols and for the calves that he had made.
See here, I. How Rehoboam was strengthened by the accession of the priests and Levites, and all the devout and pious Israelites, to him, even all that were true to their God and their religion. 1. Jeroboam cast them off, that is, he set up such a way of worship as he knew they could not in conscience comply with, which obliged them to withdraw...
Commenting on 2 Chronicles 11:13-23
So they strengthened the kingdom of Judah,.... Made it more numerous, and in a better condition to defend itself: and made Rehoboam son of Solomon strong three years; established him on the throne, strengthened the government in his hands, and were the means of preserving him in the pure worship of God for the space of time mentioned, the reason of which follows: for three...
he ordained him priests--The persons he appointed to the priesthood were low and worthless creatures (Kg1 12:31; Kg1 13:33); any were consecrated who brought a bullock and seven rams (Ch2 13:9; Exo 29:37). for the high places--Those favorite places of religious worship were encouraged throughout the country. for the devils--a term sometimes used for idols in general (Lev 17:7).