Mahasiot was one of the Levitical musicians appointed by King David to serve in the temple service. His name is mentioned in connection with the organization of temple singing and music. He was part of the Levitical choir that served before the ark of the covenant.
18and with them their relatives of the second rank: Zechariah, Jaaziel, Shemiramoth, Jehiel, Unni, Eliab, Benaiah, Maaseiah, Mattithiah, Eliphelehu, Mikneiah, and Obed-Edom and Jeiel, the gatekeepers.
16David told the chiefs of the Levites to appoint their relatives as singers, to sound aloud with instruments of music—harps, lyres, and cymbals—lifting their voices in joy.
17So the Levites appointed Heman son of Joel; from among his relatives, Asaph son of Berechiah; and from the sons of Merari, their relatives, Ethan son of Kushaiah;
18and with them their relatives of the second rank: Zechariah, Jaaziel, Shemiramoth, Jehiel, Unni, Eliab, Benaiah, Maaseiah, Mattithiah, Eliphelehu, Mikneiah, and Obed-Edom and Jeiel, the gatekeepers.
25So David, the elders of Israel, and the commanders of thousands went with rejoicing to bring up the ark of the covenant of the LORD from the house of Obed-Edom.
28So all Israel brought up the ark of the covenant of the LORD with shouts, with the sound of the ram's horn, with trumpets and cymbals, and with harps and lyres sounding out.
After the ark had been placed in the tent David had pitched, Mahasiot and the other Levites continued their service of praise and music before the Lord's ark.
5Asaph was the chief, Zechariah second to him, then Jeiel, Shemiramoth, Jehiel, Mattithiah, Eliab, Benaiah, Obed-Edom, and Jeiel, with harps and lyres; and Asaph sounded the cymbals.