Then the LORD said to Moses, “Come up to Me on the mountain and stay here, so that I may give you the tablets of stone, with the law and commandments I have written for their instruction.”
The LORD tells Moses to come up the mountain and remain there so He may give him the stone tablets bearing the law and commandments written for instruction.
It states the purpose of Moses's ascent: receiving the written covenant instruction.
12Then the LORD said to Moses, “Come up to Me on the mountain and stay here, so that I may give you the tablets of stone, with the law and commandments I have written for their instruction.” 13So Moses set out with Joshua his attendant and went up on the mountain of God. 14And he said to the elders, “Wait here for us until we return to you. Aaron and Hur are here with you. Whoever has a dispute can go to them.” 15When Moses went up on the mountain, the cloud covered it, 16and the glory of the LORD settled on Mount Sinai. For six days the cloud covered it, and on the seventh day the LORD called to Moses from within the cloud. 17And the sight of the glory of the LORD was like a consuming fire on the mountaintop in the eyes of the Israelites. 18Moses entered the cloud as he went up on the mountain, and he remained on the mountain forty days and forty nights.