Numbers 10:10

10:10 “Also in the time when you rejoice, such as on your appointed festivals or at the beginnings of your months, you must blow with your trumpets over your burnt offerings and over the sacrifices of your peace offerings, so that they may become a memorial for you before your God: I am the Lord your God.”

Numbers 14:14

14:14 then they will tell it to the inhabitants of this land. They have heard that you, Lord, are among this people, that you, Lord, are seen face to face, that your cloud stands over them, and that you go before them by day in a pillar of cloud and in a pillar of fire by night.