Leviticus 14:21-22

21“If the person is poor and does not have sufficient means, he must take one male lamb as a guilt offering for a wave offering to make atonement for himself, one-tenth of an ephah of choice wheat flour mixed with olive oil for a grain offering, a log of olive oil,

22and two turtledoves or two young pigeons, which are within his means. One will be a sin offering and the other a burnt offering.