Out of the city. Possibly Memphis or Tanis, more likely the latter city (see on ch. 7:15), where the king resided, and to which Moses and Aaron went when sent by God to interview the king or when called by him.
Spread abroad my hands. This is one of several texts in which the custom of spreading one’s hands in prayer is mentioned. Not only Moses prayed in this fashion, but also Job (Job 11:13), Solomon (2 Chron. 6:13), and Ezra (Ezra 9:5).
The earth is the Lord’s. Although the word translated “earth” could also be rendered “land,” and thus applied to Egypt, the former is probably correct, because it was ever God’s purpose to teach men to recognize Him, not as a local god, but as the Ruler of heaven and earth.