Leviticus 14:21

And if he [be] poor, and cannot get so much; then he shall take one lamb [for] a trespass offering to be waved, to make an atonement for him, and one tenth deal of fine flour mingled with oil for a meat offering, and a log of oil;

Ver. 21. And if he be poor.] there is a proviso for poor people: God makes no difference, but accepts of a little where much is to be had.