The Prophet ﷺ forbade the price paid for a dog, the hire paid to a prostitute, and the gift given to a soothsayer. (Using translation from Abū Dāʾūd 3428)
عَنِ النَّبِيِّ ﷺ أَنَّهُ «نَهَى عَنْ ثَمَنِ الْكَلْبِ وَمَهْرِ الْبَغِيِّ وَحُلْوَانِ الْكَاهِنِ»