And one cried unto another, and said, Holy, holy, holy, is the LORD of hosts: the whole earth is full of his glory.
One cried unto another Holy, holy, holy (is) the Lord of hosts - (Revelation 4:8) The Trinity is implied (see note on "Lord" Isaiah 6:1). Gods holiness is the key-note of Isaiah's whole prophecies.
The whole earth (is) full of his glory. The Hebrew more emphatically, the fullness of this whole earth is His glory (Psalms 24:1; Psalms 72:19).