Leviticus 14:50 Midrash

וְשָׁחַ֖ט אֶת־הַצִּפֹּ֣ר הָאֶחָ֑ת אֶל־כְּלִי־חֶ֖רֶשׂ עַל־מַ֥יִם חַיִּֽים׃

And he shall kill one of the birds in an earthen vessel over running water.

Read midrashic interpretation of Leviticus 14:50: and classical rabbinic exegesis.