The Wealth of Nations by Part 2 Chapter 2 Page 76

practice upon the banking trade are not perhaps generally understood even by men of business themselves, I shall endeavour to explain it as distinctly as I can.

The customs of merchants, which were established when the barbarous laws of Europe did not enforce the performance of their contracts, and which during the course of the two last centuries have been adopted into the laws of all European nations, have given such extraordinary privileges to bills of exchange that money is more readily advanced upon them than upon any other species of obligation, especially when they are made payable within so short a period as two or three months after their date.

If, when the bill becomes due, the acceptor does not pay it as soon as it is presented, he becomes from that moment a bankrupt.