Leviticus 14:19-22

19Then the priest is to sacrifice the sin offering and make atonement for the one to be cleansed from his uncleanness. After that, the priest shall slaughter the burnt offering 20and offer it on the altar, with the grain offering, to make atonement for him, and he will be clean.

21If, however, the person is poor and cannot afford these offerings, he is to take one male lamb as a guilt offering to be waved to make atonement for him, along with a tenth of an ephah of fine flour1 mixed with olive oil for a grain offering, a log of olive oil, 22and two turtledoves or two young pigeons, whichever he can afford, one to be a sin offering and the other a burnt offering.