צו את אהרן את בניו לאמר: זאת תורת העלה… (צו ו:ב)

The word “צו” can also mean “צותא” – to be together.  The Gemara states (ברכות סג) the following: “איו התורה נקנית אלה בחבורה” – the Torah can only be acquired by keeping together as a group.  In this Possuk, Moshe Rabbenu taught the Yidden a valuable lesson: Suppose you want your Torah learning to reach higher and higher, so you must connect with the likes of Aaron and his sons, who were Kohanim and tzaddikim.