It is narrated from Sayyiduna Thawban (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) had himself cupped and gave the cupper his wage, and said: "Feed it (the wage) as fodder to the water-carrying camel."
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1409