Leviticus 25:50

25:50 He must calculate with the one who bought him the number of years from the year he sold himself to him until the jubilee year, and the cost of his sale must correspond to the number of years, according to the rate of wages a hired worker would have earned while with him.

Leviticus 27:3

27:3 the conversion value of the male from twenty years old up to sixty years old is fifty shekels by the standard of the sanctuary shekel.

Leviticus 27:16

Redemption of Vowed Fields

27:16 “‘If a man consecrates to the Lord some of his own landed property, the conversion value must be calculated in accordance with the amount of seed needed to sow it, a homer of barley seed being priced at fifty shekels of silver.

Leviticus 27:19

27:19 If, however, the one who consecrated the field redeems it, he must add to it one fifth of the conversion price and it will belong to him.