A friend in need is a friend indeed.

患难中的朋友，才是真正的朋友。

《新英汉大辞典》

This is "a friend in need is a friend indeed."

这就是“患难见真情”。

youdao

A friend in need is a friend indeed!

一个朋友在需要的是真正的朋友！

youdao

My personal rule was that a cop in need is a friend indeed, no matter how I felt about them personally.

FORBES: Do Law Enforcement Officers Have "A Code" Or A Culture Where They Overlook The Transgressions Of Other Cops Or Retired Cops?

Indeed, a real friend of anyone, including Israel, is supposed to be frank and offer counsel, especially when there is so much at stake.

CNN: Chuck Hagel is a friend to Israel

Martin Freeman stars as Arthur Dent, your basic tetchy Brit, who is dragged along by his un-British indeed, unhuman friend Ford Prefect (Mos Def) on a trip through some of the more risible highlights of deep space.

NEWYORKER: The Hitchhiker's Guide to the Galaxy