Matthew 18:7
"It will be too bad for the world because of occasions that cause people to fall away [from God]! For it is inevitable that such occasions come, but it is too bad for that person who is responsible for causing it to happen.
Romans 14:15
For if your brother is hurt [spiritually] by [your eating a certain] food, you are no longer acting lovingly [toward him]. Do not destroy [spiritually] the person Christ died for by what you eat.
Romans 14:20-21
Do not destroy God's work [i.e., someone's life] for the sake of something to eat. All foods are truly clean [ceremonially]; however, it is wrong for a person to eat something when it causes another person to fall [away from God].
1 Corinthians 8:11-12
So, this weak brother, for whose sake Christ died, becomes [spiritually] destroyed, [and all] because of your "knowledge" [i.e., you know that such eating is harmless, but your weak brother does not know this, so he is led into sin by your unloving example].