Ibn Ezra on Exodus 24:18/אבן עזרא על שמות כ״ד:י״ח

1AND MOSES ENTERED…AND WENT UP INTO THE MOUNT. Its meaning is, and Moses went up to the top of the mount where God’s glory was.

2AND MOSES WAS IN THE MOUNT. He did not come down. Scripture writes concerning these forty days, I did neither eat bread nor drink water (Deut. 9:9). This is a great wonder. There never was such a miracle before.