Moab is my wash-pot, in which I shall wash my feet. I shall bring them into the lowest degree of servitude, and make them contemptible and miserable. See 2 Samuel 8:2. Over Edom, an old, and proud, and insolent, and cruel enemy of Israel, will I cast out my shoe, i.e. I will use them like slaves; either holding forth my shoes, that they may pluck them off; or throwing my shoes at them, either in anger or contempt, as the manner of many masters was and is in such cases. Or, I will take possession of them; which was done by treading upon their land. Or, I will tread upon their necks; as they did in like case, Joshua 10:24. But these notions suit not with this phrase of casting or throwing the shoe. Philistia, triumph thou because of me; or, over me, as thou didst in former years use to triumph and insult over the poor Israelites. It is an ironical expression, signifying that her triumphs were come to an end.
Related Commentaries of Psalms 60:8
Psalms 60:8
8 Moab is my washpot; over Edom will I cast out my shoe: Philistia, triumpha thou because of me.