Will a person be held accountable if they keep their clothes in the closet for forty days without wearing them, with the exception of what is stored for summer or winter, as the religious studies teacher mentioned?

The assertion that a person will be held accountable for not using their permissible possessions within a specific timeframe requires an Islamic legal proof, which is absent. However, the texts of Islamic law condemn extravagance (israf) and squandering (tabdhir) and forbid them. This refers to spending on what is inappropriate, or spending excessively on what is appropriate.