I heard the Messenger of Allah ﷺ say, "Every nation has its trial, and the trial of my nation is wealth."
حدثنا أبو العلاء الحسن بن سوار حدثنا ليث بن سعد عن معاوية بن صالح عن عبد الرحمن بن جبير بن نفير عن أبيه
سمعت رسول الله ﷺ يقول إن لكل أمة فتنة وإن فتنة أمتي المال
Its isnad is sahih. Hasan bin Sawwar Marwazi is one of Imam Ahmad's trustworthy teachers. Tirmidhi related the hadith, 4/569, no. 2336, in the chapter on asceticism, on what has been said about the trial of this nation being wealth, and said, hasan sahih gharib. Hakim also graded it sahih, 4/318, and Dhahabi endorsed him.