Leviticus 5:7
If, however, he cannot afford a lamb, he may bring to the LORD as restitution for his sin two turtledoves or two young pigeons--one as a sin offering and the other as a burnt offering.

Leviticus 14:21
If, 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 an ephah of fine flour mixed with olive oil for a grain offering, a log of olive oil,

Leviticus 14:24
The priest shall take the lamb for the guilt offering, along with the log of olive oil, and wave them as a wave offering before the LORD.

Leviticus 15:14
On the eighth day he is to take two turtledoves or two young pigeons, come before the LORD at the entrance to the Tent of Meeting, and give them to the priest.

Numbers 6:10
On the eighth day he must bring two turtledoves or two young pigeons to the priest at the entrance to the Tent of Meeting.