The wording of one narration is: "His armour and war equipment are endowed in the path of Allah. And as for Abbas bin Abd al-Muttalib (may Allah be pleased with him), the paternal uncle of the Messenger of Allah (peace and blessings be upon him), his zakah is a charity upon him, and as much again along with it."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوقف / 11916