Numbers 4:29-30

As for the sons
<01121>

of Merari
<04847>_,

thou shalt number
<06485> (8799)

them after their families
<04940>_,

by the house
<01004>

of their fathers
<01>_;

From thirty
<07970>

years
<08141>

old
<01121>

and upward
<04605>

even unto fifty
<02572>

years
<08141>

old
<01121>

shalt thou number
<06485> (8799)

them, every one that entereth
<0935> (8802)

into the service
<06635>_,

to do
<05647> (8800)

the work
<05656>

of the tabernacle
<0168>

of the congregation
<04150>_.

{service: Heb. warfare}