The festival of Shavuot celebrates the giving of the Torah at Mount Sinai.
The Eternal One spoke to Moses: "Take a census of the Gershonites also, by their ancestral house and by their clans." - Numbers 4:21-22
The Eternal One spoke to Moses, saying: "Speak to Aaron and say to him, 'When you mount the lamps, let the seven lamps give light at the front of the lampstand.'" - Numbers 8:1-2
The Eternal One spoke to Moses, saying, "Send emissaries to scout the land of Canaan, which I am giving to the Israelite people; send one man from each of their ancestral tribes, each one a chieftain among them." - Numbers 13:1-2
Now Korach, son of Izhar son of Kohath son of Levi, betook himself, along with Dathan and Abiram sons of Eliab, and On son of Peleth--decendants of Reuben--to rise up against Moses, ... - Numbers 16:1-2