The Wealth of Nations by Part 2 Chapter 2 Page 45

whole stock upon hand, or of goods to the value of his whole stock upon hand, once in the year. By being obliged to keep so great a sum unemployed, he must sell in a year five hundred pounds’ worth less goods than he might otherwise have done.

His annual profits must be less by all that he could have made by the sale of five hundred pounds worth more goods; and the number of people employed in preparing his goods for the market must be less by all those that five hundred pounds more stock could have employed. The merchant in Edinburgh, on the other hand, keeps no money unemployed for answering such occasional demands. When they actually come upon him, he satisfies them from his cash account with the bank, and gradually replaces the sum borrowed with the money or paper which comes in from the occasional sales of his