9:6 the mark. The “mark upon the foreheads” (Ezekiel 9:4) is evidently similar to the future angelic seal which will be placed on “the servants of our God in their foreheads” (Revelation 7:3) during the coming period of great tribulation. These faithful Jews were to be supernaturally protected from slaughter in God’s terrible judgment on Israel’s apostasy.
9:6 begin at my sanctuary. A comprehensive principle of divine judgment is that “unto whomsoever much is given, of him shall be much required” (Luke 12:48). “Judgment must begin at the house of God” (I Peter 4:17). “Be not many masters, knowing that we shall receive the greater condemnation” (James 3:1). The people of Israel and Judah had been led into apostasy by their leaders, including especially false prophets and worldly priests.