Judges 12:6 Then said they unto him, Say now Shibboleth: and he said Sibboleth: for he could not frame to pronounce it right. Then they took him, and slew him at the passages of Jordan: and there fell at that time of the Ephraimites forty and two thousand. 10 I MC VC

Nehemiah 13:24 And their children spake half in the speech of Ashdod, and could not speak in the Jews’ language, but according to the language of each people. MC VC