1 Corinthians 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 Corinthians 14:27

14:27 If someone speaks in a tongue, it should be two, or at the most three, one after the other, and someone must interpret.

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