40

Number 40 is used in the Bible frequently and so I started to wonder about its meaning. 

The heavy rain had been for 40 days when Noah was in the Ark, and Israelites wandered in the desert for 40 years. 

Further, Israel’s spies stayed 40 days to spy out Cannan, and Jesus was tempted by Satan for 40 days.

I am not sure the meaning of 40 per se in the Bible, but I found the similarity is the fulfillment of God’s word.