'Muster' in the Bible
from {twenty years old} and above, everyone in Israel who [is able] to go to war. You and Aaron must muster them for their wars.
"You will not muster the tribe of Levi, and you will not {take a census of} them in the midst of the {Israelites}.
"Muster the descendants of Levi according to {their families}, according to their clans. You will count every male from {one month} and above."
And Yahweh said to Moses, "Muster every firstborn male from the {Israelites} from {one month} and above and {count} their names.
from {those twenty years old} and above until {fifty years old}; you will muster them, all who come to help to do the work of the tent of assembly.
"[For] the descendants of Merari according to their clans, according to {their families}, you will muster them;
from {those thirty years old} and above until {fifty years old}; you will muster them, all who come to do the work of the tent of assembly.
So Moses instructed the people, "Muster your men of war to attack the Midianites and deliver the LORD'S vengeance against Midian.