Exodus 31:18

"And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, the two tables of the testimony, tables of stone, written with the finger of God."

It was for the purpose of receiving these tables that God had called Moses up into the mountain, as revealed in Exodus 24:12, and thus this is a fulfillment of the promise of God made to Moses at that time. The size of these tables concerns some scholars, but there is no way to determine exactly the size of them, other than by the necessary deductions from the fact of Moses' having been able to carry them in his hands, and from the further truth that they were designed to repose within the ark of the covenant, yet with enough room left for the pot of manna and the rod which budded. As for still another "problem," did God actually inscribe the tablets, or did Moses do so at God's direction? No matter how it was done, the eternal truth can be no better expressed than in the words here recorded: "TABLES OF STONE; WRITTEN WITH THE FINGER OF GOD!" We do not believe that any comment is needed.