I will shake mine hand upon (over) them. The angel reports Jehovah's message now in the first person, or speaks as the representative of Jehovah. The action of shaking the hand over a nation is one of menace (Job 31:21; Isaiah 11:15; Isaiah 19:16).
Shall be a spoil to their servants; to their slaves, those who once served them. This was true only in a spiritual sense, when the nations were won over to the true faith (see Zechariah 2:11; and comp.
Isaiah 14:2; Isaiah 49:22, etc.; Ezekiel 16:61). Septuagint, τοῖς δουλεύουσιν αὐτοῖς, "to them that serve them." Ye shall know, etc. (Zechariah 4:9; Zechariah 6:15). When this comes to pass, the Israelites shall recognize and own the Divine mission of God's messenger.