Mischna zu Jirmejahu 13:3

Unclean fish which was pickled with clean fish:If the jug contains two seahs and the unclean fish weighs ten zuz in Judean measure, which is five selas in Galilean measure, the brine is forbidden. Rabbi Judah says: it needs be a quarter [of a log] in two seahs. Rabbi Yose says: one-sixteenth of it.