The message to Aharon regarding the menorah and the inauguration of the nesi'im highlights the proper intent in serving Hashem.

Midrash Tanchuma, Parshat Beha'alotecha Siman 5- The service given to Aharon highlights a second step in the proper intent necessary in Hashem's service, following the event of the korbanot of the nesi'im.

The Torah teaches a story that gave way to a mitzva, and highlights it's importance as well.

Backstory for the unique law of pesach sheini

Bamidbar Rabba (Baha'alotecha) 15:20- the mark of leadership is the acceptance of suffering on behalf of the people

The sotah is rewarded if she is indeed innocent from infidelity, and this theme is repeated elsewhere. The question is why reward the sinner for their suffering?

Various explanations clarifying the reason a sotah would receive a blessing upon being proven innocent.

Bamidbar Rabba (Nasso) 9:1- Hashem will publicize the sins of those who think that He does not know.

Lessons derived from the fact that the Torah arranges the sections of Nazir and Sotah next to each other.

Bamidbar Rabba (Nasso) 7:1, Vayikra Rabba (Metzora) 18:4- parallel of the sending out of the impure from the camp and the healing that occured at Mt Sinai