וּבַיּוֹם֙ הַשֵּׁנִ֔י תַּקְרִ֛יב שְׂעִיר־עִזִּ֥ים תָּמִ֖ים לְחַטָּ֑את וְחִטְּאוּ֙ אֶת־הַמִּזְבֵּ֔חַ כַּאֲשֶׁ֥ר חִטְּא֖וּ בַּפָּֽר׃
And on the second day thou shalt offer a he-goat without blemish for a sin-offering; and they shall purify the altar, as they did purify it with the bullock.
Read midrashic interpretation of Ezekiel 43:22: and classical rabbinic exegesis.