This came about. And the king was Gordius, who left his cart here, as it stands, with this message: That anyone who could unravel this knot would become ruler of Asia.

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

You can hear this line at 01:26:27 in the Blu-ray version of the movie.

Quote context

[...]

- Freedom? You fight for pay! Earn it!

- Then let it be to the death.

- Of all the Greeks who fought at Granicus, no one escaped alive.

- This, Alexander, is the legend of the Gordian knot.

- In many years past, when we were sorely pressed, it was said that a king would arrive in a village cart who would help us and become our ruler.

- This came about. And the king was Gordius, who left his cart here, as it stands, with this message: That anyone who could unravel this knot would become ruler of Asia.

- Many have tried. All have failed.

- Ephesus, Sardis, Helicarnassus. He is cutting off the Persian fleet from every port along the coast of Asia Minor.

- Alexander's turning the Aegean Sea into a Greek lake!

- Alexander, your wound!

[...]