And he said to me, My grace suffices thee; for my power is perfected in weakness. Most gladly therefore will I rather boast in my weaknesses, that the power of the Christ may dwell upon me.

Forty days

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

And he was there with Jehovah forty days and forty nights; he ate no bread, and drank no water. And he wrote on the tables the words of the covenant, the ten words.

when I went up the mountain to receive the tables of stone, the tables of the covenant which Jehovah made with you, and I abode in the mountain forty days and forty nights, I ate no bread and drank no water, --

and having fasted forty days and forty nights, afterwards he hungered.

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

forty days, tempted of the devil; and in those days he did not eat anything, and when they were finished he hungered.

Horeb

And Moses tended the flock of Jethro his father-in-law, the priest of Midian. And he led the flock behind the wilderness, and came to the mountain of God to Horeb.

And the whole of mount Sinai smoked, because Jehovah descended on it in fire; and its smoke ascended as the smoke of a furnace; and the whole mountain shook greatly.

Remember the law of Moses my servant, which I commanded unto him in Horeb for all Israel, the statutes and ordinances.

General references

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