China. The word for 4 sounds just like the word for death.
germs
paedophilia's
It is believed that if a bird flys in your home someone in your family will die
lore
Magic is not superstition, it is a craft, practiced by any number of people world wide.
Inside men's minds - for they knew not better. Superstition and poorly understood natural processes.
It is a superstition for which there is no basis in reality.
There is no Scriptural support. This is a development/superstition of men in many cultures.
One superstition is the number four is bad luck. The Chinese Mandarin word for four sounds similar to the Chinese Mandarin word for death. So, in some elevators in China, there is NO fourth floor.
Eve was believed to pluck a four leaf clover when she got kicked out of the garden of edenn.
in the USA, it was a number one hit in 1973
It is pure superstition and nothing more.