Why, they're on their way to the water hole.
4 seconds sound clip from the X Minus 1 - The Veldt by Ray Bradbury classic radio drama series.
You can hear this line at 00:07:58 in the radio play.
Quote context
[...]
- Let's get out of this sun. It's a little too real.
- Oh, George, you promised you'd look around.
- Wait a minute. There are the vultures.
- There! There are the lions. Far over, that way.
- Why, they're on their way to the water hole.
- It's some animal. A zebra or a baby giraffe, maybe.
- Can you see it? Are you sure?
- It's a little late to be sure.
- Nothing over there but cleaned bone, and the vultures swooping down for what's left.
[...]