Ps 60:8

60:8 Moab . . . Edom . . . Philistia. Moab and Edom were east of Judah, and Philistia was west of Judah on the Mediterranean coast. These countries were traditional enemies of Israel, but in this song God exults in His power and authority over them.

cast my shoe. A gesture of contempt, or possibly a claim to ownership (Ruth 4:7).