مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3797
Jihad
(Section III) - Section 1
وَعَن زيد بن خالدٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مَنْ جَهَّزَ غَازِيًا فِي سَبِيلِ اللَّهِ فَقَدْ غَزَا وَمَنْ خَلَفَ غَازِيًا فِي أَهْلِهِ فقد غزا»
Zaid b. Khalid reported God’s Messenger as saying, “He who equips a fighter in God’s path has taken part in the fighting, and he who looks after a fighter's family when he is away has taken part in the fighting." (Bukhari and Muslim.)
Mishkat al-Masabih, 3797صَحِيح (الألباني)