In Revelation 14, three angels fly over the earth with messages from heaven. The first angel calls all people to worship God as Creator: “And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people, Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters” (Revelation 14:6-7). This passage contains Revelation’s longest reference to an Old Testament source, and that source is the Fourth Commandment’s reminder to “remember the Sabbath day, to keep it holy. …For in six days the Lord made heaven and earth, the sea, and all that in them is, and rested the seventh day” (Exodus 20:8, 11). According to the Bible, then, worshipping God on the seventh day is an important part of true worship for all people today.