- We must have faith!
- Faith in what? You, Aaron?

4 seconds sound clip from the The Ten Commandments (1956) movie soundboard.

You can hear this line at 03:30:29.248 in the Blu-ray version of the movie.

Quote context

[...]

- Moses went up into the forbidden ground to receive God's law!

- Yes, but he's not returned!

- We share your pain. We sympathize. But will sympathy lead us to this land flowing with milk and honey?

- Now, we have no leader!

- Don't be fooled! Moses will return!

- Would a God who's shown you such wonders let Moses die before his work is done?

- His work is done.

- His mother! So beautiful is the hope of a mother! But there are other mothers among you! What will become of your children?

- We must have faith!

- Faith in what? You, Aaron?

- Can you lead us to this land of promise? Do you know where it is?

- Tell us!

- Where is it?

- Across the wilderness!

- Then who is to lead us?

- You, Dathan!

- Where could I bring you, except to Egypt?

- Where there is death?

- No! Where there is food!

- Pharaoh would kill us all.

- Not if a god of Egypt went before us!

[...]