Amidst the urgency of leaving Egypt, while the masses are preoccupied with gathering wealth and possessions, Moses focuses on a profound historical and spiritual mission. He dedicates himself to fulfilling an ancient oath to Joseph. This sharp contrast highlights Moses as a wise leader who prioritizes spiritual responsibilities over material gain [כלי יקר, רבנו בחיי, חומת אנך]. Engaging with the dead at this triumphant moment also served a practical purpose. It reminded the people of human mortality, helping to moderate their intense eagerness for physical wealth [כלי יקר]. Chronologically, on the very first day of the departure from Rameses, the remains of all the tribal ancestors were gathered together. It was only at the second encampment, Sukkot, that Moses set Joseph's coffin apart to be carried individually [הטור הארוך, פענח רזא].
Taking Joseph's remains was also a vital spiritual strategy. Moses knew the people would soon face the Red Sea. He carried the bones so that the merit of Joseph, who famously fled from temptation, would stand by the Israelites and cause the sea to flee and split before them [כלי יקר, רבנו בחיי, חומת אנך]. Furthermore, in the early stages of their journey, the Israelites did not yet have the Ark of the Covenant to protect them. Joseph's coffin served as their spiritual weapon in battle, as his life embodied the principles of the Ten Commandments [כלי יקר]. The original oath Joseph demanded was binding across generations. He made his brothers swear, and they committed to obligating their descendants to fulfill the promise of bringing his remains out of Egypt upon their redemption [רש״י, מזרחי, גור אריה].
Unlike his father Jacob, who was immediately buried in Canaan, Joseph understood that his brothers and children lacked the political influence with Pharaoh to secure such an arrangement [רש״י, הדר זקנים]. Beyond practical limitations, Joseph intentionally left his coffin in Egypt as a lasting symbol of hope. Its presence among the Israelites served as a constant reminder that God would eventually remember and redeem them, sustaining their faith through the bitter years of exile and preventing despair [שפתי כהן, רש״ר הירש]. His request to be taken up alongside the people carried deep messages of unity, indicating that the Israelites were to bring up the remains of all the other tribes along with him [רש״י, שפתי חכמים, העמק דבר]. Moreover, this collective act of kindness was meant to rectify the historical sin of his brothers selling him. By carrying him out in brotherhood, the ancient fracture was healed, and the nation was unified [אור החיים].
As the leader of the generation, Moses viewed the transportation of the coffin as his own personal duty [ספורנו]. Practically, the coffin remained directly in his presence. Since Moses belonged to the tribe of Levi, the ritual impurity associated with the dead was permitted within the Levite camp [תורה תמימה, העמק דבר, פני דוד]. His profound dedication earned a divine reward of measure for measure. Because the greatest leader of Israel personally tended to Joseph's remains, God Himself tended to Moses's burial at the end of His servant's life [תורה תמימה, רבנו בחיי]. Ultimately, although Moses initiated this great Commandment with immense devotion, he did not live to enter the land of Israel and finish the task. In the later historical records, the fulfillment of this duty is credited to the Israelites who finally buried Joseph in Shechem. This teaches a lasting principle that a Commandment is ultimately credited to the one who completes it [תורה תמימה, שפתי כהן].