F or by the last words of David the Levites were numbered from twenty years old and above:
فَحَسَبَ آخِرِ تَعلِيماتِ داوُدَ، صارَ الَّلاوِيُّونَ يُعَدُّونَ اعتِباراً مِنْ سِنِّ العِشْرِينَ فَما فَوْقُ.