It was narrated from Haram bin Munayyisah that :
his father asked the Prophet (ﷺ) about the earnings of a cupper and he forbade him from that. Then he mentioned his need and he said: "Spend it on feeding your she-camels that draw water." (ES)
English reference (ES): Vol. 3, Book 12, Hadith 2166 (ES)
Arabic reference (ES): Book 12, Hadith 2250 (ES)