For. Because. Greek. hoti.
heaven. Singular. See Matthew 6:9; Matthew 6:10.
shout. word of command. Greek. keleusma. Only here in NT. In the Septuagint in Proverbs 30:27, the rendering of which is, The locust has no king, yet it marches orderly at one word of command.
archangel. Only here and in Jude 1:9, where he is called Michael, which connects this event with Daniel 12:1.
trump. Compare Matthew 24:31 and 1 Corinthians 15:52.
the dead. App-139.
Christ. App-98.