Priests: Revenues of Redemption-Money of the First-Born
Source: TTT
Numbers 3:48, 51
Give the money to Aaron and his sons as the redemption price for the excess among the Israelites.” / And Moses gave the redemption money to Aaron and his sons in obedience to the word of the LORD, just as the LORD had commanded him.
Numbers 18:15, 16
The firstborn of every womb, whether man or beast, that is offered to the LORD belongs to you. But you must surely redeem every firstborn son and every firstborn male of unclean animals. / You are to pay the redemption price for a month-old male according to your valuation: five shekels of silver, according to the sanctuary shekel, which is twenty gerahs.