1 Corinthians 9:26

9:26 So I do not run uncertainly or box like one who hits only air.

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 10:24

10:24 Do not seek your own good, but the good of the other person.

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