So this weak brother, for whom Christ died, is destroyed by your knowledge.

John 6:27
Do not work for food that perishes, but for food that endures to eternal life, which the Son of Man will give you. For on Him God the Father has placed His seal of approval."

Romans 14:15
If your brother is distressed by what you eat, you are no longer acting in love. Do not by your eating destroy your brother, for whom Christ died.

Romans 14:20
Do not destroy the work of God for the sake of food. All food is clean, but it is wrong for a man to let his eating be a stumbling block.

1 Corinthians 8:4
So about eating food sacrificed to idols: We know that an idol is nothing at all in the world, and that there is no God but one.

And through your knowledge shall the weak brother perish, for whom Christ died?