You need to find the source. Which I have asked you for before.
I don't need to do anything for you, Adam. You're not my keeper. The point in fact has been mentioned and discussed a number of times on the forum anyway, including while you've been here.
Probably you'd be better advised to look for the source yourself, and when you find it, keep quiet about it as it's embarrassing that you don't know such a basic fact given that you've posted here 21,000 times over many years.