יהושע, פרק א׳, פסוק י״ב

As the nation prepares to enter the land, their leader addresses the specific tribes who have already secured their inheritance. Reuben, Gad, and half the tribe of Manasseh had previously requested and received their territory on the eastern side of the Jordan River, choosing to settle outside the borders of the Promised Land and giving up their share in the west [ביאור שטיינזלץ, צאינה וראינה]. Now, they are called upon to join the shared military campaign of the entire nation.

The timeline of this preparation reveals a deeper layer of leadership and anxiety. These events actually took place earlier than the surrounding narrative suggests. Anticipating the looming war, Joshua approached these tribes and organized them for battle well before God appeared to him with the command to cross the Jordan. God’s subsequent revelation was specifically intended to fortify Joshua's faith, ensuring he would rely on Him rather than depending solely on the military strength of these vanguard tribes [מלבי״ם].

In his address, Joshua reminds these tribes of the commitment they made to Moses. He instructs them to leave their wives and children safely behind in their eastern cities while the men cross over fully armed to help the rest of the nation defeat the Canaanites and secure the land [צאינה וראינה]. However, Joshua goes beyond simply recalling the original condition set by Moses. He introduces a moral and logical argument. He explains that since God has already granted them peace from their surrounding enemies and provided them with their territory—a victory achieved through divine help rather than their own might—they have a strict obligation to repay this kindness. They must actively help their brothers achieve that same peace and inheritance without hesitation or laziness [אברבנאל].

Beneath this strategic military planning lies a profound message of faith meant to eliminate the people's fear of the Canaanite armies. Joshua makes it clear that the nation's ultimate victory does not actually depend on the combat skills of Reuben and Gad. Originally, Moses only required these tribes to lead the charge to calm the panic they themselves had sparked among the people when they asked to remain east of the Jordan. Joshua's true goal is to instill a deep understanding within the Israelites: they are not invading as warriors conquering by the power of the sword, but as rightful heirs returning to the land of their ancestors. It is God who fights for them and brings down their enemies [אלשיך].