And he said to me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.

Forty days

And Moses went into the midst of the cloud, and ascended the mount: and Moses was on the mount forty days and forty nights.

And he was there with the LORD forty days and forty nights; he neither ate bread nor drank water: and he wrote upon the tables the words of the covenant, the ten commandments.

When I ascended the mount, to receive the tables of stone, even the tables of the covenant which the LORD made with you, then I abode in the mount forty days and forty nights, I neither ate bread, nor drank water:

And when he had fasted forty days and forty nights, he was afterward hungry.

And he was there in the wilderness forty days tempted by Satan: and was with the wild beasts, and the angels ministered to him.

Being forty days tempted by the devil. And in those days he ate nothing; and when they were ended, he was afterward hungry.

Horeb

Now Moses kept the flock of Jethro his father-in-law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of God, even to Horeb.

And mount Sinai was altogether in a smoke, because the LORD descended upon it in fire: and the smoke of it ascended as the smoke of a furnace, and the whole mount trembled greatly.

Remember ye the law of Moses my servant, which I commanded to him in Horeb for all Israel, with the statutes and judgments.

General references

And Jethro, Moses's father-in-law, came with his sons and his wife to Moses into the wilderness, where he encamped at the mount of God: