John Wesley on Isaiah 60:6

The multitude - The treasure, that is brought upon camels. By these, and such like figurative expressions in several verses of this chapter is implied the coming in of all nations to Christ, and therefore they are brought in as presenting the chief commodities of their respective countries. Dromedaries - A smaller sort of camel. Ephah - The Midianites, and Ephahites dwelt beyond Arabia. Sheba - A country in Arabia Felix, whose queen it was, that came to visit Solomon, and her bringing gifts might be a type of this, Solomon being a type of Christ. Gold - The principal commodities with which this country abounded, by which we are to understand whatever is precious.