2 Samuel 6:14

Ephod which ordinarily was the habit of priests. But no law restrained others from using it, (Calmet) particularly on sacred occasions; as we often see laics in a surplice, when they have to sing Church music, &c. (Menochius) --- David had also on a cloak of byssus; (Paralipomenon) and still Michol speaks as if he had been uncovered; because in this solemn ceremony, he was inspired to divest himself of his royal robes, and to act with a degree of enthusiasm; (Haydock) which would not have been otherwise becoming in a king. David is considered by some of the fathers as a figure of the priests of the new law; as he ate the loaves of proposition, was dressed like priests, &c. Sacerdos scitus erat David. (1 Iræn. iv.; St. Ambrose v. in Luc. vi.) (Calmet)