en_tn/luk/11/39.md

the outside of cups and bowls

Washing of the outside of containers was a part of the ritual practices of the Pharisees.

but the inside of you is filled with greed and wickedness

This is a metaphor that compares the way they ignore the inside of the container to how they ignore their own internal condition. (See: rc://en/ta/man/translate/figs-metaphor)

Did not the one who made the outside also make the inside?

This is a rhetorical question. Jesus was rebuking the Pharisees for not understanding that what is in their hearts matters to God. It can be translated as a statement as it is in the UDB. (See: rc://en/ta/man/translate/figs-rquestion)

give to the poor what is inside

"Give what is inside to poor people." The meaning is "focus on using the inside for God instead of only cleaning the outside."