All the rocks start to blend in with each other when you build as many rock altars as Jacob, but the rocky formation behind Yahweh in the last panel is, in fact, his new bed.
Speaking of beds, I bought a futon from Ikea a few months ago, and the entire thing broke in like twenty places. It was made out of wood, with little zig-zag lines where they'd apparently glued shorter wood planks together instead of just using long wood planks... and I guess I wasn't supposed to step on those wood glue zig-zags because that broke it. And then once one broke, it was like a domino effect. I removed the keystone of my futon frame.
In conclusion, despite the fact that a rock bed might look stupid and uncomfortable, I think I would have rather had a sturdy bed of rock than that piece of Ikea shit.

I'm sure you would be happier with a rock, Lucas! Why, just look how happy the Flintstones are with their furniture:

Rocks are actually far more comfortable than they look. In fact, I tried a rock-bed myself when I went back in time to do it with hawt cavewomen. Now you may be thinking to yourself, "Hawt cavewomen? Srsly?" Yes. Observe:

And not only did Archaic Homo sapiens look just like modern humans, they were also very intelligent! I was even able to teach my hawt cave-girlfriend to communicate with spoken language. Sort of:
