Constant warfare was common between the Jews and neighboring tribes, and the kingdom was ultimately split into two: the Kingdom of Judah and the Kingdom of Israel. Around 750 BC, the Kingdom of Israel was annihilated by the Assyrians, but an attempt at gaining control of Judah failed.
Godly fear is a foundational truth of the church that is part of the apostles doctrine. Acts 2 v 42 says, And they continued steadfastly in the apostles doctrine and fellowship, in breaking of bread and in prayers. 43, And fear came upon every soul: and many wonders and signs were done by the apostles..
The fear of Friday the 13th is called friggatriskaidekaphobia - Frigg is the Norse goddess whom Friday is named after and triskaidekaphobia means the fear of 13. It's also known as paraskevidekatriaphobia, partly from the Greek word Friday.