Bible verse
Judges 12:6
When a man tried to cross, they would ask, “Are you from Ephraim?” If he said, “Nah,” they would tell him, “Say Shibboleth.” But he would say “Sibboleth” because he could not pronounce it right, then they would grab him and kill him right there. That day, they laid down 42,000 from Ephraim.