Rev 14:6-7

Then I saw an angel flying in the midst of heaven, having the everlasting gospel to proclaim to those who dwell on the earth, and to every nation, tribe, language, and people, (Rev 14:6)

saying with a loud voice, "Fear the Lord and give glory to Him, for the hour of His judgment has come; and you shall worship Him who made heaven and earth, and the sea and fountains of waters." (Rev 14:7)