Albert Barnes Commentary Luke 11:39

"And the Lord said unto him, Now ye the Pharisees cleanse the outside of the cup and of the platter; but your inward part is full of extortion and wickedness." — Luke 11:39 (ASV)

See Matthew 23:25. Ravening. Robbery, plunder. Here the sense is that the cup and platter were filled with what had been unjustly taken from others. That is, they lived by their wickedness; their food was procured by dishonesty and extortion.

This was a most terrible charge; and as it was applied, among others, to the man who had invited the Saviour to dine with him, it shows that nothing would prevent his dealing faithfully with the souls of men. Even in the Pharisee's own house, and when expressly invited to partake of his hospitality, he loved his soul so much that he faithfully warned him of his crimes.