What does Les Feldick say about God's timing?
God is meticulous in His timing. The four angels were kept waiting for a particular hour of a particular day of a particular month. The first temple built by Solomon was destroyed on exactly the same month and day as the later temple.
Les explains that the Euphrates River is a boundary between eastern religions and those of the west, and the four angels were confined in that boundary area. These angels were loosed and prepared, meaning God had kept them waiting for a particular hour of a particular day of a particular month. Les stresses that God is meticulous in His timing. He also notes that Solomon's first temple was destroyed on exactly the same month and day as the later temple.