1 Corinthians 8:11

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

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

Καὶ ἀπολεῖται ὁ ἀσθενῶν ἀδελφὸς ἐπὶ τῇ σῇ γνώσει, δι' ὃν Χριστὸς ἀπέθανεν;

Kai apoleitai o asthenōn adelphos epi tē sē gnōsei, di' on Christos apethanen;