1 Corinthians 8:9

8:9 But be careful that this liberty of yours does not become a hindrance to the weak.

1 Corinthians 8:11

8:11 So by your knowledge the weak brother or sister, for whom Christ died, is destroyed.

1 Corinthians 11:30

11:30 That is why many of you are weak and sick, and quite a few are dead.