from twenty

Numbers 1:3, 18, 20
You and Aaron are to register those who are twenty years of age or older by their divisions--everyone who can serve in Israel's army. . . .

Numbers 14:29
Your bodies will fall in this wilderness--all who were numbered in the census, everyone twenty years of age or older--because you have grumbled against Me.

Numbers 26:2
"Take a census of the whole congregation of Israel, those twenty years of age and older, by the houses of their fathers--all who can serve in the army of Israel."

Numbers 32:11
Because they did not follow Me wholeheartedly, not one of the men twenty years of age or older who came out of Egypt will see the land I swore to give Abraham, Isaac, and Jacob--