Hesabu 4 : 35 Numbers chapter 4 verse 35

tangu waliopata umri wa miaka thelathini na zaidi, hata umri wa miaka hamsini, kila mtu aliyeingia katika utumishi kwa kazi katika hema ya kukutania,
soma Mlango wa 4

from thirty years old and upward even to fifty years old, everyone who entered into the service, for work in the Tent of Meeting.