Talmud for Ketubot 153:19

HALAKHAH: “The following one forces to divorce: Those smitten with boils,” etc. “The meqammeṣ.” This is the dung collector; but some say it is the tanner. Rebbi Ze‘ira said, the Mishnah implies that this is the dung collector since we have stated: “The meqammeṣ and the tanner.”¹⁶⁶The Babli, 77a, explains the problem away that in the opinion of the dissenting Tosephta (7:11) there are different kinds of tanners, smelling differently. “The brass refiner.” Samuel said, that is the one who smelts brass from its ore¹⁶⁷In the Babli, 77a, this is only one opinion; Rav disagrees and holds that he repairs metal pots..