Jami` at-Tirmidhi, Hadith 1629 ⓘ
Narrated Zaid bin Khalid Al-Juhani: That the Messenger of Allah said, "Whoever prepares a fighter in Allah's cause, or looks after the family of a fighter, then he has participated in a military expedition." [Abu 'Eisa said:] This Hadith is Hasan Sahih.
حَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ ابْنِ أَبِي لَيْلَى، عَنْ عَطَاءٍ، عَنْ زَيْدِ بْنِ خَالِدٍ الْجُهَنِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ جَهَّزَ غَازِيًا فِي سَبِيلِ اللَّهِ أَوْ خَلَفَهُ فِي أَهْلِهِ فَقَدْ غَزَا " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ .
also referenced under: Book 22, Hadith 11 (In-Book) & Volume 3, Book 20, Hadith 1629 (DarusSalam)