ENOfficial
It was narrated from Abu Hurairah that the Prophet (ﷺ) said: "The Muslim does not have to pay Sadaqah on his slave or his horse."
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ خُثَيْمِ بْنِ عِرَاكِ بْنِ مَالِكٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " لَيْسَ عَلَى الْمُسْلِمِ صَدَقَةٌ فِي غُلاَمِهِ وَلاَ فِي فَرَسِهِ " .
sunnah.com