1 Corinthians 10:8

8Neitherμηδὲshould we commit sexual immoralityπορνεύωμεν,asκαθώςsomeτινεςof themαὐτῶνcommitted sexual immoralityἐπόρνευσαν,andκαὶfellἔπεσανin oneμιᾷdayἡμέρᾳtwenty-εἴκοσιthreeτρεῖςthousandχιλιάδες.

And we should not commit sexual immorality, as some of them committed sexual immorality, and twenty-three thousand fell in one day.