Matthew 18:6-7
But that person who causes one of these little ones [i.e., humble followers of the Lord] who believes in me to be led astray [from God], he would have been better off to have had a huge millstone tied around his neck and dumped into a deep ocean [Note: This "millstone" was a heavy circular stone rolled over grain to crush it and was moved by an animal walking in a circle].
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 14:21
[So], it is better [for you] not to eat bread, nor to drink wine, nor to do anything [else] that could cause your brother to fall [away from God].
1 Corinthians 8:11-13
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].
1 Peter 2:9
But you people are especially chosen [by God]; you are a royal body of priests; you are a nation especially set apart for God's use; you are a people who belong exclusively to God, that you may express the virtues of the One who called you out of darkness [i.e., of sin and error], and into His marvelous light [i.e., righteousness and truth].