Histadlus is not a mitzvah it is the consequence of Adam Harishon's bad choice.

Who is the person who is constantly involved in charity?

The person who works to support his family?

But don't think that you have to make extraordinary efforts to support them more-you have to know that you work, but Hashem determines your success.  Histadlus is not a mitzvah it is the consequence of Adam Harishon's bad choice. You have to do something to support your family, it is your responsibility to work, but it is Hashem's responsibility to support your family.  When you work you should have in mind that you are working, but the results are completely from Hashem.

from the Shiur on Naaleh: Obligation For Effort
Teacher: Rebbetzin Tziporah Heller Class: Bitachon: Meaning of Trust