With this seal, you rule in my absence as though you were king.

7 seconds sound clip from the Alexander the Great (1956) movie soundboard.

You can hear this line at 00:30:01 in the Blu-ray version of the movie.

Quote context

[...]

- Aristotle was right. You're not ready to rule.

- All you're fit for is to fight and die like any Macedonian soldier. Then at least live like one. Get drunk. Choose a woman.

- I do! I choose her!

- Young fool! Fool! You fool!

- By my right as king, I give you, Alexander of Macedonia, the seal of regency.

- With this seal, you rule in my absence as though you were king.

- You have the power to collect taxes, raise troops, make war and hold royal court.

- For as it is with the king, according to ancient Macedonian law, so it is with his regent.

- He is, in his single person, lord of all things, both open and secret, at once general and absolute.

- I am leaving Antipater here as your adviser.

[...]