Psalms 104:5-9

The psalmist described God creating the earth and then covering it with a blanket, as one would cover a new-born infant. He pictured the earth as though it were a building and stressed the stability of what God had made. He did not mean that the earth has literal foundations and is flat. God proceeded to separate the waters on the earth from those above the earth (Psalms 104:6-7; cf. Genesis 1:6-8). Then he separated the dry ground from the waters on the earth (Psalms 104:8-9; cf. Genesis 1:9-13). The seas are humanly unmanageable, but God set their boundaries and prohibited the waters from crossing them. The frequent references to God controlling water in this psalm demonstrate His sovereignty over all that is difficult to manage in creation.