Anakin and Kenobi force push

VADER

[aside:] As soon as I do strike him, he doth rise.

If my lightsaber shall not win the duel,

Mayhap my knowledge of the Force shall do't.

OBI-WAN

Now come, thou Force of light, and be mine aid!

[They try to use the Force against each other, but both are flung back.]

(Additional text cut)

[Obi-Wan and Vader continue to duel

Act 5, Scene 2