Before giving the second set of tablets, what did God tell Moses to do?

Answer: Chisel out two new tablets

God told Moses to chisel out two stone tablets like the first ones he had broken, and He would write the same words on them.

“Then the LORD said to Moses, “Chisel out two stone tablets like the originals, and I will write on them the words that were on the first tablets, which you broke.”— Exodus 34:1 (BSB)