Numbers 10:10-11

10Also in the day of your gladness and in your appointed 1feasts, and on the first days of your months, 2you shall blow the trumpets over your burnt offerings, and over the sacrifices of your peace offerings; and they shall be as a reminder of you before your God. I am the Lord your God.”

11Now in 3the second year, in the second month, on the twentieth of the month, the cloud was lifted from over the 4tabernacle of the testimony;