This is the painting of a reflection rainbow that I featured and explained in my huge Skywatcher Guide. There are 4 rainbows visible here. Note: There is no such thing as a triple or quadruple rainbow!
I've seen triple rainbow.. depending on what exactly you mean by that. A faint outer bow separate from a second big, bright, visible bow with a shadow of a 3rd one just inside it (at least red, orange, yellow and a hint of green). unfortunately I wasn't in a position to get a picture of it at the time.
double rainbow all the way across the sky yeah yeaaaah so intense,what does this it's so bright so vivid it's starting to look triple rainbow omg double rainbow
unfortunately I wasn't in a position to get a picture of it at the time.