Leviticus 5:10-12 New Revised Standard Version (NRSV)
10 And the second he shall offer for a burnt offering according to the regulation. Thus the priest shall make atonement on your behalf for the sin that you have committed, and you shall be forgiven.
11 But if you cannot afford two turtledoves or two pigeons, you shall bring as your offering for the sin that you have committed one-tenth of an ephah of choice flour for a sin offering; you shall not put oil on it or lay frankincense on it, for it is a sin offering. 12 You shall bring it to the priest, and the priest shall scoop up a handful of it as its memorial portion, and turn this into smoke on the altar, with the offerings by fire to the Lord; it is a sin offering.
Leviticus 5:10-12 New International Version (NIV)
10 The priest shall then offer the other as a burnt offering in the prescribed way and make atonement for them for the sin they have committed, and they will be forgiven.
11 “‘If, however, they cannot afford two doves or two young pigeons, they are to bring as an offering for their sin a tenth of an ephah[a] of the finest flour for a sin offering. They must not put olive oil or incense on it, because it is a sin offering. 12 They are to bring it to the priest, who shall take a handful of it as a memorial[b] portion and burn it on the altar on top of the food offerings presented to the Lord. It is a sin offering.