You are not allowed to cut the body of a dead person with a knife, nor are you allowed to have patterns tattooed on your body. I am Jehovah. Leviticus 19:28

So Moses made a bronze serpent and hung it on a pole. Anyone who was bitten would look at the bronze serpent and live. Numbers 21 9

Tattoos are forbidden by God. In addition, the snake is coiled on a staff, not on a cross, which means salvation. This sign is on the ambulance.