In this verse, the boundary lines for the inheritance of the tribes of Israel are being described. The specific focus here is on the territory assigned to the descendants of Joseph, which includes the tribes of Ephraim and Manasseh. The description of the boundary extending to the west, reaching the territory of the Japhletites, Lower Beth Horon, Gezer, and ending at the Mediterranean Sea, provides a clear picture of the geographical area that these tribes were to inhabit.
This allocation of land is significant as it represents the fulfillment of God's covenant promise to the patriarchs Abraham, Isaac, and Jacob, regarding the land of Canaan. The detailed boundaries not only served as a legal and practical guide for the Israelites but also reinforced their identity and heritage as God's chosen people. The mention of specific locations like Lower Beth Horon and Gezer also highlights the historical and cultural context of the time, where land ownership was crucial for survival, prosperity, and legacy.
Overall, this verse serves as a reminder of God's faithfulness in providing for His people and the importance of land as a symbol of His blessings and promises.