The answer is: Isaiah

Isa 20:2-3

Did you know that the bold prophet Isaiah walked barefoot and naked for three years as a powerful act of prophetic symbolism? This rather startling command reveals the depth of God's message for Israel and surrounding nations. Biblical nudity in this case isn’t just a fashion faux pas; it serves as a striking, visceral illustration of humiliation and persecution that would befall the people if they did not turn away from their ways.

Isaiah was famous for his foretelling of the Messiah and his vivid portrayals of God's plans. His outrageous behavior echoed the prophetic traditions of the time, where actions were frequently used over words to communicate urgent spiritual lessons. That sense of illustration can be surprising: prophets stemming from Israel often engaged in bizarre stunts to draw attention, like Jeremiah who buried a linen belt or Ezekiel’s symbolic cooking method. Each act paints an important picture about the social and political landscapes they lived in.

Luke, in the New Testament, brings attention to Isaiah in the celebrations around Jesus’ life, strengthening Isaiah's position as a bridge between the Old and New Testaments. Footage of an ancient walk through the streets, stripped of societal markers, visually reminds us of the vulnerability faced by mankind. Though the people's response may have varied, this really was God's way of shaking them from spiritual slumber. Quite the eye-catching method, wouldn’t you agree?