Sayyiduna Zayd bin Khalid al-Juhani (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Whoever gives a fasting person food to break his fast, or enables someone to perform Hajj, or equips a fighter, or looks after his family in his absence, will have a reward equal to his."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5251