Shibboleth
shib'-o-leth (shibboleth): A test of speech applied by the men of Gilead to the Ephraimites, who wished to cross the Jordan, after defeat. If they pronounced the word cibboleth, their dialectic variety of speech betrayed them. (Jg 12:6). The word probably has the sense of stream or "flood" (compare Ps 69:2).
⇒See a list of verses on SHIBBOLETH in the Bible.