Over them, i.e. over all the porters, and other Levites and priests before mentioned. The Lord was with him, to direct, and assist, and bless him in the discharge of his place; which seems here related to encourage his successor, and consequently all the priests and Levites of this time, to go on courageously and resolutely in their work, not doubting but God will stand by them as he had done by their fathers.
Related Commentaries of 1 Chronicles 9:20
1 Chronicles 9:20
20 And Phinehas the son of Eleazar was the ruler over them in time past, and the LORD was with him.