WNT(i)
11 Why, your knowledge becomes the ruin of the weak believer--your brother, for whom Christ died!
12 Moreover when you thus sin against the brethren and wound their weak consciences, you are, in reality, sinning against Christ.
13 Therefore if what I eat causes my brother to fall, never again to the end of my days will I touch any kind of animal food, for fear I should cause my brother to fall.