1 Corinthians 8:10-12

10For if someone sees you, a person having knowledge, eating in an idol’s temple, then if he is weak, will he not be encouraged to eat things sacrificed to idols [and violate his own convictions]?

11For through your knowledge (spiritual maturity) this weak man is ruined [that is, he suffers in his spiritual life], the brother for whom Christ died.

12And when you sin against the brothers and sisters in this way and wound their weak conscience [by confusing them], you sin against Christ.