All these who were chosen to be gatekeepers in the thresholds were two hundred and twelve. These were reckoned by genealogy in their villages, whom David and Samuel the seer did ordain in their office of trust. Verse ConceptsSeersVillages

David spoke to the chief of the Levites to appoint their brothers the singers, with instruments of music, stringed instruments and harps and cymbals, sounding aloud and lifting up the voice with joy. So the Levites appointed Heman the son of Joel; and of his brothers, Asaph the son of Berechiah; and of the sons of Merari their brothers, Ethan the son of Kushaiah; and with them their brothers of the second degree, Zechariah, Ben, and Jaaziel, and Shemiramoth, and Jehiel, and Unni, Eliab, and Benaiah, and Maaseiah, and Mattithiah, and Eliphelehu, and Mikneiah, and Obed-Edom, and Jeiel, the doorkeepers. read more.
So the singers, Heman, Asaph, and Ethan, were given cymbals of brass to sound aloud; and Zechariah, and Aziel, and Shemiramoth, and Jehiel, and Unni, and Eliab, and Maaseiah, and Benaiah, with stringed instruments set to Alamoth; and Mattithiah, and Eliphelehu, and Mikneiah, and Obed-Edom, and Jeiel, and Azaziah, with harps tuned to the eight-stringed lyre, to lead. Chenaniah, chief of the Levites, was over the song: he instructed about the song, because he was skillful. Berechiah and Elkanah were doorkeepers for the ark. Shebaniah, and Joshaphat, and Nethanel, and Amasai, and Zechariah, and Benaiah, and Eliezer, the priests, blew the trumpets before the ark of God: and Obed-Edom and Jehiah were doorkeepers for the ark.

He appointed certain of the Levites to minister before the ark of the LORD, and to celebrate and to thank and praise the LORD, the God of Israel: Asaph the chief, and second to him Zechariah, Jeiel, and Shemiramoth, and Jehiel, and Mattithiah, and Eliab, and Benaiah, and Obed-Edom, and Jeiel, with stringed instruments and with harps; and Asaph with cymbals, sounding aloud; and Benaiah and Jahaziel the priests with trumpets continually, before the ark of the covenant of God.

So he left there, before the ark of the covenant of the LORD, Asaph and his brothers, to minister before the ark continually, as every day's work required; and Obed-Edom with their brothers, sixty-eight; Obed-Edom also the son of Jeduthun and Hosah to be doorkeepers; and Zadok the priest, and his brothers the priests, before the tabernacle of the LORD in the high place that was at Gibeon, read more.
to offer burnt offerings to the LORD on the altar of burnt offering continually morning and evening, even according to all that is written in the law of the LORD, which he commanded to Israel; and with them Heman and Jeduthun, and the rest who were chosen, who were mentioned by name, to give thanks to the LORD, because his loving kindness endures forever; and with them Heman and Jeduthun with trumpets and cymbals for those that should sound aloud, and with instruments for the songs of God; and the sons of Jeduthun to be at the gate. All the people departed every man to his house: and David returned to bless his house.