Some people from Syria came to ‘Umar and said: We have acquired wealth and horses and slaves,and we want to pay zakah on them as a purification. He said: I shall do what my two predecessors did. He consulted the Companions of Muhammad ﷺ, among whom was ‘Ali, and ‘Ali said: It is good, provided it does not become a regular tax that is taken from them after you are gone. (Using translation from Aḥmad 82)
نَاسٌ مِنْ أَهْلِ الشَّامِ إِلَى عُمَرَ ؓ فَقَالُوا إِنَّا قَدْ أَصَبْنَا أَمْوَالًا خَيْلًا وَرَقِيقًا نُحِبُّ أَنْ يَكُونَ لَنَا فِيهِ زَكَاةٌ وَطَهُوَرٌ قَالَ مَا فَعَلَهُ صَاحِبَايَ قَبْلي فَافْعَلْهُ فَاسْتَشَارَ عُمَرُ ؓ عَلِيًّا ؓ فِي جَمَاعَةٍ مِنْ أَصْحَابِ رَسُولِ اللهِ ﷺ ؓ فَقَالَ عَلِيٌّ ؓ هُوَ حَسَنٌ إِنْ لَمْ يَكُنْ جِزْيَةٌ يُؤْخَذُونَ بِهَا رَاتِبَةً