“This cannot be the real Mount Sinai,” I said to my son ... On the first day of exploration, we set out to find the Rock of Horeb, the rock split by Moses’ rod overlooking the plains ...

It also pertains to Moses spending 40 days on Mount Sinai when he received the Ten Commandments, Elijah’s 40-day journey to Mount Horeb, the 40 days of rain during the Great Flood and the 40 ...