Sayyiduna Zayd bin Khalid al-Juhani (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "Whoever provides a fasting person with food to break his fast, or equips a pilgrim or a fighter, will have the like of their reward, without anything being reduced from their reward."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5258