'Age' in the Bible

" '{Before} old age you shall get up, and you shall show respect for an old person; and you shall revere your God; I [am] Yahweh.

if your proper value is [for] a male from {twenty years of age} up to {sixty years of age}, then your proper value shall be fifty shekels [of] money according to the sanctuary's shekel.

And if from {five years of age} up to {twenty years of age}, then your proper value shall be twenty shekels [for] the male and ten shekels for the female.

And if from {a month of age} up to {five years of age}, then your proper value shall be five shekels [of] money [for] the male, and your proper value for the female [shall be] three shekels [of] money.

And if from {sixty years of age} and above: if a male, then your proper value shall be fifteen shekels; and for the female, ten shekels.