'Three' in the Bible

‘When you enter the land and plant all kinds of trees for food, then you shall count their fruit as forbidden. Three years it shall be forbidden to you; it shall not be eaten.

then I will so order My blessing for you in the sixth year that it will bring forth the crop for three years.

But if they are from a month even up to five years old, then your valuation shall be five shekels of silver for the male, and for the female your valuation shall be three shekels of silver.