have an itching palm 贪财

A：Don’t trust Ben.
B：Why?
A：He has an itching palm and is sure to cheat you out of your share of the profits.
B：Then I must be careful about him.

A：别信任本。
B：为什么？
A：他很贪财，肯定会从你身上骗得好处。
B：那我必须小心了。