كتاب الزكاة
Read the English translation first, with the original Arabic directly underneath.
It was narrated from Abu Hurairah that the Prophet (ﷺ) said:
"A person does not have to pay Sadaqah on his horse or his slave."
لَيْسَ عَلَى الْمَرْءِ فِي فَرَسِهِ وَلاَ فِي مَمْلُوكِهِ صَدَقَةٌ