“Never play cards with a man called Doc. Never eat at a place called Mom's. Never sleep with a woman whose troubles are worse than your own.”

In jail, Cross-Country Kline to Dove Linkhorn.
Source: A Walk on the Wild Side (1956)
Context: But blow wise to this, buddy, blow wise to this: Never play cards with a man called Doc. Never eat at a place called Mom's. Never sleep with a woman whose troubles are worse than your own. Never let nobody talk you into shaking another man's jolt. And never you cop another man's plea. I've tried 'em all and I know. They don't work. / Life is hard by the yard, son. But you don't have to do it by the yard. By the inch it's a cinch. And money can't buy everything. For example: poverty.