1 Chronicles 15:18, 23

There was also a second group of Levites: Zechariah, Jaaziel, Shemiramoth, Jehiel, Unni, Eliab, Benaiah, Maaseiah, Mattithiah, Eliphelehu, Mikneiah, Obed-Edom, and Jeiel. They were the Levite guards.

Berekiah and Elkanah were two of the guards for the Ark of the Agreement.