John Gills Exposition of the Bible Commentary - 1 Chronicles 16:38
The Levites, the brethren of Asaph and Obededom, these were left before the ark to minister there: Obededom also the son of Jeduthun ; or Ethan, which some take to be another Obededom; but the ו , "vau" may be explanative, "even Obededom": and Hosah to be porters ; these he left to be doorkeepers of the ark. read more
Matthew Henry's Complete Commentary - 1 Chronicles 16:37-43
The worship of God is not only to be the work of a solemn day now and then, brought in to grace a triumph; but it ought to be the work of every day. David therefore settles it here for a constancy, puts it into a method, which he obliged those that officiated to observe in their respective posts. In the tabernacle of Moses, and afterwards in the temple of Solomon, the ark and the altar were together; but, ever since Eli's time, they had been separated, and still continued so till the temple... read more