What does Daniel 3:5 mean?
Babylon effectively ruled over the entire ancient middle east—the king's commands in this passage emphasize this fact. Nebuchadnezzar's dream (Daniel 2:1–3) apparently inspired him to create a large golden idol (Daniel 2:36–38; 3:1). He commanded officials from all over the empire to attend a dedication (Daniel 3:2–3). His command, contained here, was delivered in both poetic and literal terms to every person in the entire kingdom (Daniel 3:4).Throughout history music has been used to stir emotions and bring about a desired response. Here, the meaning of the long list of musical objects is more symbolic than literal. This passage in Daniel notably repeats several phrases—including four copies of the same list of instruments (Daniel 3:5, 7, 10, 15). This evokes the legalistic, oppressive nature of the king's commands. The wide variety of instruments also implies the large reach of the Babylonian Empire.
To "fall down" in this context means to kneel or lay face down in an expression of humility. When the people hear "every kind of music," as a cue, they are to worship this idol commissioned by Nebuchadnezzar.
Daniel 3:1–7 follows the incident where Daniel interpreted Nebuchadnezzar's frightening dream. It's possible that the king took pride in being depicted as a head of gold (Daniel 2:37–38), and so he makes a golden image of himself to be revered. The people of Babylon are commanded to worship this idol under threat of death: being burned alive. Repetition in the passage highlights the overbearing, controlling nature of the king's edict. This passage continues a segment of the Bible recorded in Aramaic (Daniel 2:4—7:28).
Nebuchadnezzar builds a golden idol, possibly inspired by the explanation of his own dream (Daniel 2:36–38). He commands all people to worship it, at a given musical signal, on pain of death. Three Hebrew men openly defy this command and are thrown into a superheated furnace. To his shock, the king sees a supernatural figure with the still-living Israelites. Not only do they survive, but their clothes aren't singed nor even smelling like smoke. The king praises their faith, and their God, commanding that no one speak ill of the God of Shadrach, Meshach, and Abednego.