John Wesley on Isaiah 46:1

Bel - The chief idol of the Babylonians, called by profane historians Jupiter Belus. Boweth - As the Babylonians used to bow down to him to worship, so now he bows down to the victorious Persians. Nebo - Another of the famous idols, which used to deliver oracles. Their idols - Were taken and broken, and the materials of them, gold, silver, and brass, were carried upon beasts into Persia. Your carriages - O ye Persians, to whom he turns his speech.