The biblical account describes the Israelites being led by Joshua and crossing the Jordan into Canaan where they laid siege to the city of Jericho. There, God spoke to Joshua telling him to march around the city once every day for six days with the seven priests carrying ram's horns in front of the ark. On the seventh day they were to march around the city seven times and the priests were to blow their ram's horns. This Joshua did, and he commanded his people not to give a war-cry until he told them to do so. On the seventh day, after marching around the city the seventh time, the priests sounded their ram's horns, and Joshua ordered the people to shout. The walls of the city collapsed, and the Israelites were able to charge straight into the city. The city was destroyed and every man, woman, and child in it was killed. Only Rahab was spared because she had hidden the two spies sent by Joshua and had hung a scarlet rope from her house. After this, Joshua burned the remains of the city and cursed any man who would rebuild the city of Jericho would do so at the cost of his firstborn son.
The Israelites continue to destroy the southern and northern cities of Canaan, killing all living inhabitants, as God has stipulated. While much of the promised land still remains to be conquered, the people of Israel begin to settle in the land, dividing it amongst the twelve tribes. After God gives Israel rest from its enemies for many years, an ailing Joshua makes a farewell pronouncement to the nation of Israel. Joshua goads the Israelites to be strong and to obey all of God’s laws, throwing away any idols and refraining from intermarriage with the native people. The people assure Joshua they will be faithful to the covenant, but Joshua reluctantly accepts this assurance, worried that obedience for Israel will prove quite difficult.
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For full text of Libretto by Morell