And Shebaniah, and Jehoshaphat, and Nethanel, and Amasai, and Zechariah, and Benaiah, and Eliezer, the priests, did blow with the trumpets before the ark of God: and Obed-edom and Jehiah were doorkeepers for the ark.
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George Leo Haydock
Jehias is called Jehiel, ver. 18., and 21. He, Obededom, Barachias, and Elcana, (ver. 23.) were probably the four chief porters who attended the ark in arms; and others were, afterwards, stationed at the temple, chap. ix. 17. The two former took part also in the music, ver. 21. (Calmet)
Perhaps two preceded and two went behind the ark, to keep off the crowd. (Menochius)