60:6 David quoted a prophecy assuring Israel's military success that he had received. God had said He would give Shechem and the valley of Succoth (the Jordan Valley?) to Israel. Shechem is the site where God first promised Canaan to Abraham and his descendents (Gen. 12). It was also where Jacob lived after he returned to Canaan from Paddan-aram and Laban's oppression (Gen. 33:18-20). Succoth was the place Jacob settled after God delivered him from Esau when Jacob returned from Paddan-aram (Gen. 33:17). Both places had associations with past victories over Arameans and the fulfillment of God's promises concerning the land.
60:7 Gilead was Israel's promised territory east of the Jordan River. The tribal territory of Manasseh straddled the Jordan. Ephraim was one of Israel's strongest and most secure tribes. It lay in central western Canaan and was similar to a helmet in that it provided defense. God had promised Judah the right to rule the other tribes (Gen. 49:10) that the scepter symbolized.
60:8 Moab would serve God as a washbasin. His people would experience purification there as they fought this neighbor. God would throw His shoe toward Edom as a man threw his shoe toward his servant when he came home. The Edomites were God's servants, not His sons as the Israelites were. The NIV's translation, "Over Philistia I shout in triumph,"pictures God announcing David's victory over the Arameans to this enemy.