أَخْبَارِ ٱلْأَيَّامِ ٱلثَّانِي 31:17

وَٱنْتِسَابِ ٱلْكَهَنَةِ حَسَبَ بُيُوتِ آبَائِهِمْ، وَٱللَّاوِيِّينَ مِنِ ٱبْنِ عِشْرِينَ سَنَةً فَمَا فَوْقُ حَسَبَ حِرَاسَاتِهِمْ وَأَقْسَامِهِمْ،

Both to the genealogy of the priests by the house of their fathers, and the Levites from twenty years old and upward, in their charges by their courses;