Whoever equips a fighter in the cause of Allah has indeed taken part in the fight himself; and whoever looks after the dependents of a fighter in his absence properly has indeed taken part in the fight himself

The Prophet (may Allah's peace and blessings be upon him) informed that if a person equips a warrior in the cause of Allah and provides him with the means for travel and the necessary provisions, such as the weapon, mount, food, expenses, etc., he is considered to be a warrior in the cause of Allah and obtains the same reward. And if a person takes care of the affairs of a warrior in the cause of Allah and takes his place in looking after his family during his absence, he is considered to be a warrior in the cause of Allah.

1. Muslims are urged to cooperate in goodness.
2. Ibn Hajar said: This Hadīth encourages doing good to those who do something in the interest of Muslims or carry out one of their important tasks.
3. The general rule: Whoever aids someone in obeying Allah Almighty will have the same reward as his, without having this reward diminished in the least.

صحيح البخاري (4/ 27) (2843). صحيح مسلم (3/ 1506) (1895). بهجة الناظرين شرح رياض الصالحين، لسليم الهلالي (1/ 267). تطريز رياض الصالحين، لفيصل آل مبارك (ص143). كنوز رياض الصالحين، لمجموعة من الباحثين (3/ 588). لسان العرب، لابن منظور (15/ 123). شرح رياض الصالحين، لابن عثيمين (2/ 374). نزهة المتقين شرح رياض الصالحين، لمجموعة من الباحثين (1/ 202).