Leviticus 27:6
If the person is one month old up to five years old, the conversion value of the male is five shekels of silver, and for the female the conversion value is three shekels of silver.
Numbers 3:40-43
Then the Lord said to Moses, "Number all the firstborn males of the Israelites from a month old and upward, and take the number of their names.
Numbers 18:14-16
"Everything devoted in Israel will be yours.
Treasury of Scripture Knowledge
Summary
And if it be from a month old even unto five years old, then thy estimation shall be of the male five shekels of silver, and for the female thy estimation shall be three shekels of silver.
Bible References
From
Numbers 3:40
Then the Lord said to Moses, "Number all the firstborn males of the Israelites from a month old and upward, and take the number of their names.
Numbers 18:14
"Everything devoted in Israel will be yours.