The Prophet ﷺ forbade the price paid for a dog, the hire paid to a prostitute, and the gift given to a soothsayer.  

عَنِ النَّبِيِّ ﷺ أَنَّهُ نَهَى عَنْ ثَمَنِ الْكَلْبِ وَمَهْرِ الْبَغِيِّ وَحُلْوَانِ الْكَاهِنِ