I heard the Prophet ﷺ say, "If you meet a tax collector, kill him."
حدثنا موسى بن داود حدثنا ابن لهيعة عن يزيد بن أبي حبيب عن عبد الرحمن بن أبي حسان عن مخيس بن ظبيان عن رجل من بني جذام
سمعت النبي ﷺ يقول إذا لقيتم عاشرا فاقتلوه
No references are available.
Its isnad is daif, due to the anonymity of the narrator from Malik bin Utahiyah. Haythami said the same in 3/87 and attributed it to Ahmad and Tabarani, but he cited several hadiths with various wordings that he described as sahih.