1 Korintus 5:9

5:9 I wrote you in my letter not to associate with sexually immoral people.

1 Korintus 8:12

8:12 If you sin against your brothers or sisters ¹  in this way and wound their weak conscience, you sin against Christ.

[8:12]  ¹ tn See note on the phrase “brothers and sisters” in 1:10.