Incense: None but Priest to offer
Source: TTT
Numbers 16:40
just as the LORD commanded him through Moses. This was to be a reminder to the Israelites that no outsider who is not a descendant of Aaron should approach to offer incense before the LORD, lest he become like Korah and his followers.
Deuteronomy 33:10
He will teach Your ordinances to Jacob and Your law to Israel; he will set incense before You and whole burnt offerings on Your altar.