Leviticus 14:19-22

19The priest will also sacrifice the offering for sin to make peace with the Lord for the one who is being cleansed from his impurity. After that, he will slaughter the burnt offering.

20The priest will sacrifice the burnt offering and the grain offering on the altar. So the priest will make peace with the Lord for that person, and the person who had the skin disease will be clean.

21“But if the one to be cleansed is poor and cannot afford that much, he must take one male lamb, present it to make peace with the Lord for himself, and use it for his guilt offering. He will take only eight cups of flour mixed with olive oil as a grain offering, a quart of olive oil,

22and two mourning doves or two pigeons (whatever he can afford). The one will be an offering for sin and the other a burnt offering.