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.
Targum Jonathan on Leviticus
and the slayer shall kill one turtle dove in a vessel of earthenware with spring water;