Mishkat al-Masabih #1901
Fasting
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَعَنْ زَيْدِ بْنِ خَالِدٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «من فَطَّرَ صَائِمًا أَوْ جَهَّزَ غَازِيًا فَلَهُ مِثْلُ أَجْرِهِ» . رَوَاهُ الْبَيْهَقِيُّ فِي شُعَبِ الْإِيمَانِ وَمُحْيِي السّنة فِي شرح السّنة وَقَالَ صَحِيح
Zaid b. Khalid reported God’s messenger as saying, ‘He who gives one who has been fasting something with which to break his fast, or who equips a fighter will have a reward equivalent to his.”
Baihaqi transmitted it in Shu'ab al-iman, and Muhyi as-sunna, who said it is sahih, in Sharh as-sunna.
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About Mishkat al-Masabih
This hadith is #1901 from Mishkat al-Masabih, in the Book of Fasting.