رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1306
The Book of Jihad
Obligation of Jihad
وَعَن زيد بْن خَالِد، رَضِيَ اللَّه عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ قَالَ: مَنْ جَهَّزَ غَازِيًا فِي سَبِيلِ اللَّهِ فَقَدْ غَزَا وَمَنْ خَلَفَ غَازِيًا فِي أَهْلِهِ بخير فقد غزا ((مُتَّفَقٌ عَلَيْهِ))
Zaid bin Khalid (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "He who equips a Ghazi (fighter) in the way of Allah is as if he has taken part in the fighting himself; and he who looks after the dependants of a Ghazi in his absence, is as if he has taken part in the fighting himself." [Al-Bukhari and Muslim].
Riyad as-Salihin, 1306