Helping One’s Friend With Parnassah:
Rav Tzvi Hirsch of Rimanov zy”a (Sefer Be’eros Hamayim) says that this verse is teaching us how to fulfill the commandment to love one’s friend like himself (Vayikroh 19:18). The way to do this is to provide one’s fellow Jew with whatever they are lacking so that he can daven and learn Torah with a clear and pure mind, and without distracting thoughts.
If one’s friend needs money, he should give him money. If one doesn’t have money to give him, he should daven to Hashem to give him money. It is a fulfillment of the mitzvah of ahavas Yisroel to help someone with parnassah, so that he can serve Hashem properly.
The pasuk can be understood to be saying: “Hear from your brothers” - hear what they are lacking. “And judge them justly” – try to judge them favorably. If you don’t know their situation, you are in no position to judge them. It is possible that they aren’t learning or davening properly because they lack parnassah.
