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."

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا شَبَابَةُ بْنُ سَوَّارٍ، عَنِ ابْنِ أَبِي ذِئْبٍ، عَنِ الزُّهْرِيِّ، عَنْ حَرَامِ بْنِ مُحَيِّصَةَ، عَنْ أَبِيهِ، أَنَّهُ سَأَلَ النَّبِيَّ ـ ﷺ ـ عَنْ كَسْبِ الْحَجَّامِ فَنَهَاهُ عَنْهُ فَذَكَرَ لَهُ الْحَاجَةَ فَقَالَ " اعْلِفْهُ نَوَاضِحَكَ " .