"The Messenger of Allah said: 'I have exempted you from (having to pay Zakah on) houses and slaves, and there is no Zakah on less than two hundred (Dirhams)." (Using translation from Nasāʾī 2478)
قَالَ رَسُولُ اللهِ ﷺ «قَدْ عَفَوْتُ عَنِ الْخَيْلِ وَالرَّقِيقِ وَلَيْسَ فِيمَا دُونَ مِائَتَيْنِ زَكَاةٌ»