Leviticus 14:31

such as he is able to afford, the one as a sin offering and the other as a burnt offering, with the grain offering. So the priest shall make atonement for him who is to be cleansed before the LORD.

Surrounding context

14:30 And he shall offer one of the turtledoves or young pigeons, such as he can afford--

14:31 such as he is able to afford, the one as a sin offering and the other as a burnt offering, with the grain offering. So the priest shall make atonement for him who is to be cleansed before the LORD.

14:32 This is the law for one who had a leprous sore, who cannot afford the usual cleansing."

Translation and sources