[Hot, crispy nice hobbit]

Geesh... can't resist...

You can find this in the last few paragraphs of Flotsam and Jetsam, The Two Towers.

'"What about drink?" I (Pippin) said to the Ents.

'"There is water of Isen," they said, "and that is good enough for Ents and Men." But I hope that the Ents may have found time to brew some of their draughts from the mountain-springs, and we shall see Gandalf's beard curling when he returns.'

Now that I come to think of it, so do I! Gandalf's beard curling!