Looking on the internet deeply has found these results:

one should help his friend in need is the most popular phrase on the web.

one should help his friend in difficulty 110 results on the web	one should help his friend in need 1107,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Fix his BP, that should help his mental status. That should help his foot grow back. He told me himself... that he wanted to help his friend that drowned in the pool. A man should help his friends. And we know he chose to help his friends hold people up at gunpoint. The pie maker helped his friends in need, not by pretending he was something he was not, but by embracing the very thing he always was. But Charlie drowned trying to help his friends find rescue. If Childs is threatening you, Peter wants to help his friends in any way he can.

one should help his friend in difficulty

110 results on the web

one should help his friend in need

1107,000,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Fix his BP, that should help his mental status.
That should help his foot grow back.
He told me himself... that he wanted to help his friend that drowned in the pool.
A man should help his friends.
And we know he chose to help his friends hold people up at gunpoint.
The pie maker helped his friends in need, not by pretending he was something he was not, but by embracing the very thing he always was.
But Charlie drowned trying to help his friends find rescue.
If Childs is threatening you, Peter wants to help his friends in any way he can.