From Chabad.org: General Overview: Moses sends scouts to Canaan and all of them — except Joshua and Caleb — bring back frightening reports. The people react fearfully and rebelliously. G‑d decrees a forty year delay until the Israelites will enter Canaan, during which time all males between the ages of twenty and sixty will perish. Many Israelites then attempt to unilaterally proceed to Canaan, but are cut down by the Canaanites. Various laws are discussed: libations, giving part of the dough (“challah“) to a Kohain (Priest), certain sin sacrifices, and the mitzvah of tzitzit. A Jew is found desecrating the Shabbat and is executed.
G‑d allows Moses to send scouts to reconnoiter the land of Canaan in preparation for their anticipated invasion of the land. One member of every tribe — with the exception of the tribe of Levi — was chosen for this task. Moses instructed the scouts to bring back a report regarding the nature of the land; its strengths and weaknesses. He also instructed them to bring back samples of the land’s produce.