Hesabu 4 : 3 Numbers chapter 4 verse 3

tangu waliopata umri wa miaka thelathini na zaidi hata umri wa miaka hamsini, wote waingiao katika utumishi huo, ili kufanya kazi ya hema ya kukutania.
soma Mlango wa 4

from thirty years old and upward even until fifty years old, all who enter into the service, to do the work in the Tent of Meeting.