The rich knows not who is his friend

This page is about the saying "The rich knows not who is his friend"

Possible meaning:
When you have money, you don't know if people are friendly with you because they like you, or because they like your money. The structure of this saying is difficult. In normal English it would be something like: "Rich people do not know who their friends are."

the rich (noun): rich people; people who have a lot of money