Leviticus 5:11

‘But if his offering to Yahweh is a burnt offering of birds, then he shall bring near his offering from the turtledoves or from young pigeons.

“This is the offering which Aaron and his sons shall bring near to Yahweh on the day when he is anointed; the tenth of an ephah of fine flour as a regular grain offering, half of it in the morning and half of it in the evening.

“But if he is poor and his means are insufficient, then he is to take one male lamb for a guilt offering as a wave offering to make atonement for him, and one-tenth of an ephah of fine flour mixed with oil for a grain offering, and a log of oil,

‘But if he is poorer than your valuation, then he shall be presented before the priest, and the priest shall value him; according to the means of the one who vowed, the priest shall value him.

and to offer a sacrifice according to what was said in the Law of the Lord, “A pair of turtledoves or two young pigeons.”

And according to the Law, one may almost say, all things are cleansed with blood, and without shedding of blood there is no forgiveness.