1 Chronicles 24:16

The nineteenth to Pethahiah, the twentieth to Jehezekel,

The nineteenth lot in the division fell to Pethahiah and the twentieth to Jehezekel. This naming belongs to a careful apportioning of special duties to the men best fitted for them, an arrangement that was brought to perfection as Solomon took the throne. In that order the priests were divided into twenty-four courses, a full and accurate record was made of the division, and each course was thoroughly organized under its chief. Each course was to come to Jerusalem twice in the year to attend for one week to the ministry of the sanctuary.