The Israelites have just conquered the Emorites and the Bashanites, the two mighty neighbors of Moab. Balak, king of Moab, worries that his nation would be the Israelites' next victim. He sends messengers to the Land of Midian, to Balaam, a famed non-Jewish prophet and sorcerer, asking him to come and curse the Jews. G‑d appeared to Balaam that night and instructed him not to go to Moab. "You shall not curse the people because they are blessed!"

The abovementioned purification process is continued, along with an admonition that the impure individual not enter the Tabernacle or Temple until the purification process is completed. Miriam dies in the fortieth year of the Israelites' sojourn in the desert. With Miriam's death, the waters which flowed from the miraculous "Well of Miriam" dried up. The people complain bitterly about the lack of water.

The Jews journey on, making their way towards the eastern bank of the Jordan River. Encrypted in this section is a great miracle that occurred when the Jews passed through the Arnon valley. Tall cliffs rose from both sides of this narrow valley, and in the clefts of these cliffs the Amorites, armed with arrows and rocks, were waiting to ambush the Jews. Miraculously, the mountains moved towards each other, crushing the Amorite guerrilla forces. This section ends with a song of praise for the well which sustained the Jews throughout their desert stay — and whose now-bloodied waters made the Jews aware of the great miracle that G‑d wrought on their behalf.

The Jews arrive at Mount Hor. At G‑d's command, Moses, Aaron and Aaron's son, Elazar, go up the mountain. Aaron removes his high priest's vestments and Elazar dons them. Aaron then passes away. The entire nation mourns Aaron's death for thirty days. The Amalekites, disguised as Canaanites, attack the Jews. The Jews pray to G‑d and are victorious in battle. The Jews complain about their food, claiming that they are "disgusted" by the manna. G‑d dispatches serpents into the Israelite encampment, and many Jews die. Moses prays to G‑d on the Jews' behalf. Following G‑d's instructions, Moses fashions a copper serpent and places it atop a pole. The bitten Jews would look at this snake and be healed.

G‑d tells Moses and Aaron to take a staff and gather the people in front of a certain rock. They should speak to the rock, and it will give forth water. Moses and Aaron gather everybody, and Moses strikes the rock and it gives forth water. In the course of this episode they committed a grave error, the conventional explanation being that they struck the rock instead of speaking to it. This caused G‑d to punish Moses and Aaron, barring them from leading the Jews into Israel.

The most severe of all ritual impurities is tum'at met, the impurity contracted through contact with a human corpse. This section details the purification process for an individual or object which has contracted this form of impurity. A red heifer is slaughtered and is burned together with a few added ingredients. Water from a stream is added to the ashes. On the third and seventh day after contracting tum'at met, this mixture is sprinkled upon the individual or object. After immersion in a mikvah (ritual pool), the person or object is freed of this impurity.

G‑d commands Moses to return "Aaron's staff" to the Holy of Holies, where it is to remain for perpetuity. The Jews express to Moses their fear of mistakenly entering a restricted area of the Tabernacle, and dying as a result. In response, G‑d commands the priests and the Levites to carefully guard the Tabernacle, to prevent unauthorized entry by non-priests. The Torah then lists the various gifts to which the priests were entitled. These include the privilege of eating certain sacrifices, as well as select portions of other sacrifices; receiving the five shekels for the redemption of Israelite firstborn sons; a portion of all grain, oil, and wine crops; the "first fruit"; and more. Aaron is informed that his descendents will not receive a portion in the land of Israel—instead, G‑d is their inheritance and portion.

This section describes the "test of the staffs." G‑d tells Moses to take a staff from each of the twelve tribes, with the name of each tribe's prince written upon their staff. Another staff was taken to represent the tribe of Levi, and Aaron's name was written on that staff. These staffs were placed overnight in the Holy of Holies chamber of the Tabernacle. Next morning they were removed, and miraculously Aaron's staff had budded with almond blossoms and almonds. This was further proof that Aaron was G‑d's choice for High Priest.

G‑d is angered by the Jews' association with Korach, and wishes to destroy them. Moses and Aaron pray on the Jews' behalf and the decree is averted. The earth opens up and swallows Korach and his family, and a heavenly fire consumes the rest of the 250 rebels. Moses instructs Aaron's son Elazar to retrieve the frying pans which were used for the incense offering, to flatten them and plate the altar with them—a visible deterrent for any individual who ever wishes to challenge Aaron's priesthood. The next day, the community complains that Moses and Aaron are to be blamed for the deaths of "G‑d's people."

Moses pleads with G‑d not to accept the incense offering of the rebellious group. Korach spends the night inciting the Jews against Moses, and gathers them all to the entrance of the Tabernacle to witness the grand spectacle. G‑d's glory appears.