Leviticus 14:50

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

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

and he shall kill one of the birds in an earthen vessel over running water:

and he hath slaughtered the one bird upon an earthen vessel, over running water;

and he shall slaughter one of the birds over fresh water in a clay pot.