لا تخلفن ورائك شيئا من الدنيا فإنك تخلفه لأحد رجلين: إما رجل عمل فيه بطاعة الله سبحانه فسعد بما شقيت به وإما رجل عمل فيه بمعصية الله سبحانه فكنت عونا له على المعصية وليس أحد هذين حقيقا أن تؤثره على نفسك
Don’t leave worldly possessions behind you when you die, because you leave them to one of two persons: either a person who uses them in obeying Allah almighty, so he becomes happy with something you toiled to get. Or a person who uses them in sinful deeds, so you helped him to sin. None of those two should be preferred over yourself.
The Imam is not advocating a lavish and extravagant life, rather asceticism and simplicity in this quote.
He is saying don’t leave worldly possessions behind you when you die (whether those are money, property, etc…). Either someone inherits it and uses it in virtuous deeds, in that case you will be judged in the afterlife about keeping your money idle during your lifetime without spending it yourself in virtuous deeds. Or someone else inherits it and uses it in sinful deeds, in that case you actually helped him to sin.
You shouldn’t keep your money behind to either of those. Spend money yourself in virtuous deeds during your lifetime.
Also what can be understood from this quote is that one should ideally spend his life with the bare minimum of possessions and money, so that no excess is left upon reaching death, this is the same philosophy of asceticism.