Shibboleth

Shibboleth is a single Hebrew word used once in scripture as a pronunciation test, by which the men of Gilead exposed and killed fleeing Ephraimites at the fords of the Jordan.

The Test at the Fords

After Jephthah's defeat of Ephraim, the Gileadites seal off the Jordan crossings against the survivors. Jud 12:5 sets the scene: "And the Gileadites took the fords of the Jordan against the Ephraimites. And it was so, that, when [any of] the fugitives of Ephraim said, Let me go over, the men of Gilead said to him, Are you an Ephraimite? If he said, No;". The next verse gives the test itself: "then they said to him, Now say, 'Shibboleth'; and he said 'Sibboleth'; for he did not accomplish correct pronunciation: then they laid hold on him, and slew him at the fords of the Jordan. And there fell at that time of Ephraim forty and two thousand" (Jud 12:6).

The text turns on the contrast between the two pronunciations. Ephraimite speech could not produce the sh-sound at the start of the word, and that single failure of articulation marked the speaker for death. The forty-two thousand fallen are counted at the fords — a casualty figure tied directly to the password.