Fighting for the Cause of Allah (Jihaad)
حَدَّثَنَا أَبُو مَعْمَرٍ، حَدَّثَنَا عَبْدُ الْوَارِثِ، حَدَّثَنَا الْحُسَيْنُ، قَالَ حَدَّثَنِي يَحْيَى، قَالَ حَدَّثَنِي أَبُو سَلَمَةَ، قَالَ حَدَّثَنِي بُسْرُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنِي زَيْدُ بْنُ خَالِدٍ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَنْ جَهَّزَ غَازِيًا فِي سَبِيلِ اللَّهِ فَقَدْ غَزَا، وَمَنْ خَلَفَ غَازِيًا فِي سَبِيلِ اللَّهِ بِخَيْرٍ فَقَدْ غَزَا ".Narrated Zaid bin Khalid:Allah's Messenger (ﷺ) said, "He who prepares a Ghazi going in Allah's Cause is given a reward equal to that of) a Ghazi; and he who looks after properly the dependents of a Ghazi going in Allah's Cause is (given a reward equal to that of) a Ghazi
From Sahih al-Bukhari, whose reports the scholars accept as authentic.