Strong G4592 σημεῖον sēmeion · sign

1 Corinthians

1. 1 Corinthians 1:22
   For the Jews require a sign, and the Greeks seek after wisdom:
2. 1 Corinthians 14:22
   Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe.