Numbers 1:3 - From twenty years old and upward, all that are able to go forth to war in Israel: thou and Aaron shall number them by their armies. (Verses like Numbers 1:3)
Numbers 1:18 - And they assembled all the congregation together on the first day of the second month, and they declared their pedigrees after their families, by the house of their fathers, according to the number of the names, from twenty years old and upward, by their polls. (Verses like Numbers 1:18)
Numbers 1:20 - And the children of Reuben, Israel's eldest son, by their generations, after their families, by the house of their fathers, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war; (Verses like Numbers 1:20)
Numbers 14:29 - Your carcases shall fall in this wilderness; and all that were numbered of you, according to your whole number, from twenty years old and upward, which have murmured against me, (Verses like Numbers 14:29)
Numbers 26:2 - Take the sum of all the congregation of the children of Israel, from twenty years old and upward, throughout their fathers' house, all that are able to go to war in Israel. (Verses like Numbers 26:2)
Numbers 32:11 - Surely none of the men that came up out of Egypt, from twenty years old and upward, shall see the land which I sware unto Abraham, unto Isaac, and unto Jacob; because they have not wholly followed me: (Verses like Numbers 32:11)