"Rise up, LORD! May your enemies be scattered; may your foes flee before you." (Numbers 10:35)
God instructs Moses to make two silver trumpets to be used for summoning the community and for signalling the movement of the camps. Different trumpet calls have different meanings: a long blast summons the whole assembly; short blasts signal the camps to set out; alarms signal war or times of rejoicing and festivals. The trumpets are to be blown by Aaron's sons the priests. In the second year, in the second month, on the twentieth day, the cloud lifts from over the tabernacle and Israel sets out from the wilderness of Sinai on their journey. The standard of the camp of Judah moves first, then Gershon and Merari carrying the tabernacle, then Reuben, then Kohath carrying the holy things, then Ephraim, then Dan, the rear guard. The march is precisely ordered, tribe by tribe, clan by clan.
Moses asks his father-in-law Hobab to come with them as their eyes in the desert. The narrative gives us the words spoken when the Ark sets out and when it comes to rest. When it advances Moses says: Rise up, LORD! May your enemies be scattered; may your foes flee before you. When it rests he says: return, LORD, to the countless thousands of Israel. The Ark goes before the people as their vanguard. The Catechism identifies this prayer of Moses as the model of all liturgical procession: the people of God follow the divine presence that goes before them into every new territory (CCC 2594).
Brothers and sisters, Rise up, LORD! May your enemies be scattered. This is the ancient war cry of the covenant people at the beginning of every advance. Before any significant undertaking in your life, name the enemies you face, invite God to rise, and trust that the Ark goes before you. The battle belongs to the LORD who leads the march.
Rise up, LORD! May your enemies be scattered and your foes flee before you. Go before us as the Ark went before Israel. Lead us through the wilderness to the land you have prepared. And when we come to rest, return to us, to the countless thousands who are yours. Through Christ our Lord. Amen.