Leviticus 14:20

וְהַנּוֹתָר בַּשֶּׁמֶן אֲשֶׁר עַל־כַּף הַכֹּהֵן יִתֵּן עַל־רֹאשׁ הַמִּטַּהֵר וְכִפֶּר עָלָיו הַכֹּהֵן לִפְנֵי יְהוָֽה

And the rest of the oil that is in the priest’s hand he shall put upon the head of him that is to be cleansed; and the priest shall make atonement for him before the LORD.

וְעָשָׂה הַכֹּהֵן אֶת־הַחַטָּאת וְכִפֶּר עַל־הַמִּטַּהֵר מִטֻּמְאָתוֹ וְאַחַר יִשְׁחַט אֶת־הָעֹלָֽה

And the priest shall offer the sin-offering, and make atonement for him that is to be cleansed because of his uncleanness; and afterward he shall kill the burnt-offering.

וְאִם־דַּל הוּא וְאֵין יָדוֹ מַשֶּׂגֶת וְלָקַח כֶּבֶשׂ אֶחָד אָשָׁם לִתְנוּפָה לְכַפֵּר עָלָיו וְעִשָּׂרוֹן סֹלֶת אֶחָד בָּלוּל בַּשֶּׁמֶן לְמִנְחָה וְלֹג שָֽׁמֶן

And if he be poor, and his means suffice not, then he shall take one he-lamb for a guilt-offering to be waved, to make atonement for him, and one tenth part of an ephah of fine flour mingled with oil for a meal-offering, and a log of oil;

וּשְׁתֵּי תֹרִים אוֹ שְׁנֵי בְּנֵי יוֹנָה אֲשֶׁר תַּשִּׂיג יָדוֹ וְהָיָה אֶחָד חַטָּאת וְהָאֶחָד עֹלָֽה

and two turtle-doves, or two young pigeons, such as his means suffice for; and the one shall be a sin-offering, and the other a burnt-offering.