en_tn_condensed/luk/11/30.md

For just as Jonah became a sign ... so too ... this generation

This means that Jesus will serve as a sign from God for the Jews of that day in exactly the same way as Jonah served as a sign from God to the people of Nineveh.

Son of Man will

Jesus is referring to himself. Alternate translation: "I, the Son of Man, will" (See: rc://en/ta/man/jit/figs-123person)

this generation

"the people living today"