The answer is: Isaiah

Isa 20:2-3

Isaiah, the iconoclastic prophet, took obedience to new extremes by literally walking around barefoot and naked for three years! Now, before you picture just any oddball rebellion, note that this unconventional act was a divine message meant to illustrate a critical prophetic warning to the people of Judah. Isaiah's unique attire—or lack thereof—was a visible stage show, designed to signify the upcoming Assyrian invasion and the humiliation that would befall the Egyptian and Cushite nations, they had so come to rely on.

It's fascinating to think about why God might have chosen such a peculiar method of communication. Being devoid of clothing, Isaiah sparked curiosity and alarm in the streets, causing people to ponder not only his disheveled state but also the significant prophecy unfolding. This unconventional message would leave a lasting impression, seizing the attention of indifferent hearts that often pushed spiritual truths aside.

Stepping back, you can’t help but admire the commitment shown by Isaiah. Ancient prophets frequently faced ridicule for their radical attire—and we’ve seen in other examples, like Ezekiel cooking food over cow dung or Jeremiah wearing a yoke, that those selected for God's messages worked outside the norms! Presenting stark realities in such tangible ways woke even the most slumbering believers in the community, compelling them to renew their understanding of their relationship with the Divine. Prophets, after all, were sometimes unorthodox in message and method, but they brought vital truths to the forefront, adorning them in unexpected fashions!