Some people from Sham came to Umar and said, "We have acquired wealth, horses, and slaves, and we would like there to be a zakat on them as a means of purification for us."He replied, "I will do what my two predecessors did before me."He consulted the companions of Muhammad ﷺ, among whom was Ali
. Ali said, "It is a good idea, provided it does not become a fixed tribute imposed on them after you."
حدثنا عبد الرحمن بن مهدي عن سفيان عن أبي إسحاق
جاء ناس من أهل الشام إلى عمر رضي الله عنه فقالوا إنا قد أصبنا أموالا وخيلا ورقيقا نحب أن يكون لنا فيها زكاة وطهور قال ما فعله صاحباي قبلي فأفعله واستشار أصحاب محمد ﷺ وفيهم علي رضي الله عنه فقال علي هو حسن إن لم يكن جزية راتبة يؤخذون بها من بعدك
No references are available.
Its isnad is sahih. Sufyan is Thawri. Abu Ishaq is Subayi. Haritha is Ibn Mudarrib, with the ra doubled and vowelled with a kasra, al-Abdi al-Kufi, and he is a trustworthy tabii. See 112, 218, and Muntaqa 1988.