Lining of the Pocket
My money is spent: Can I be content With pockets deprived of their lining?
The Lady's Decoy, or Man Midwife's Defence, 1738, p. 4.
When the great court tailor wished to obtain the patronage of Beau Brummel, he made him a present of a dress-coat lined with bank-notes. Brummel wrote a letter of thanks, stating that he quite approved of the coat, and he especially admired the lining.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894