I first heard it from "Oliver!" the musical:
FAGIN:
Who said crime doesn't pay?
Robin Hood - What a crook!
Gave away what he took
Charity's fine subscribe to mine
Get out and pick a pocket or two.
You've got to pick a pocket or two, boys,
You've got to pick a pocket or two!
BOYS:
Robin Hood was far too good.
He had to pick a pocket or two