en_tn/1co/01/30.md

Because of what God did

This refers to the work of Christ on the cross.

us ... our

These words refer to Paul, those with him, and the Corinthians. (See: rc://en/ta/man/jit/figs-exclusive)

Christ Jesus, who became for us wisdom from God

Possible meanings are 1) "Christ Jesus, who has made clear to us how wise God is" or 2) "Christ Jesus, who has given us God's wisdom." (See: rc://en/ta/man/jit/figs-metonymy)