Numbers 10:10-12 New Revised Standard Version, Anglicised Catholic Edition (NRSVACE)
10 Also on your days of rejoicing, at your appointed festivals, and at the beginnings of your months, you shall blow the trumpets over your burnt-offerings and over your sacrifices of well-being; they shall serve as a reminder on your behalf before the Lord your God: I am the Lord your God.
Departure from Sinai
11 In the second year, in the second month, on the twentieth day of the month, the cloud lifted from over the tabernacle of the covenant.[a] 12 Then the Israelites set out by stages from the wilderness of Sinai, and the cloud settled down in the wilderness of Paran.