My father told me, Never extended credit to a dragon.
6 seconds sound clip from the The Flight of Dragons movie soundboard.
You can hear this line at 01:06:53.037 in the Blu-ray version of the movie.
Quote context
[...]
- Peter, how'd that Beacon Street song go again?
- Tut, tut. You will be well paid. Dragons have gold, you know.
- You will be paid eventually.
- My father told me, Never extended credit to a dragon.
- Shh. Too late for such caterwaulings. Too late. For the morrow brings?
- Your rooms are ready. Will you finally to bed?
- For we may not see another night.
- And, lo, they sleep. An all too brief surcease, well earned.
- And but for the watchful moon keeping her vigil o'er the slumbering countryside, all is still.
[...]