1 Korintus 10:8

10:8 And let us not be immoral, as some of them were, and twenty-three thousand died in a single day. ¹ 

1 Korintus 15:2

15:2 and by which you are being saved, if you hold firmly to the message I preached to you – unless you believed in vain.

[10:8]  ¹ sn This incident is recorded in Num 25:1-9.