Quote from : The Treasure of the Sierra Madre Movie

Fred C. Dobbs: Say, mister. Will you stake a fellow American to a meal?
American in Tampico in white suit: Such impudence never came my way. Early this afternoon I gave you money... while I was having my shoes polished I gave you MORE money... now you put the bite on me again. Do me a favor, will ya? Go occasionally to somebody else - it's beginning to get tiresome.
Fred C. Dobbs: Ah, excuse me, mister, I never knowed it was you. I never looked at your face - I just looked at your hands and the money you gave me. Beg pardon, mister, I promise I'll never put the bite on you again.
American in Tampico in white suit: [gives him a peso] This is the very last you get from me. Just to make sure you don't forget your promise, here's another peso.
[puts another peso in Dobbs' hand]
Fred C. Dobbs: Thanks, mister. Thanks.
American in Tampico in white suit: But from now on, you'll have to make your way through life without my assistance.