“And after that I looked, and, behold, the temple of the tabernacle of the testimony in heaven was opened:”
King James Version (KJV)
15:5 After these things the temple of the tabernacle of the testimony - The holiest of all. Was opened - Disclosing a new theatre for the coming forth of the judgments of God now made manifest.
Re 15:5 After that I looked. The apostle looks again and Behold, the temple of the tabernacle of the testimony in heaven was opened. The tabernacle of the testimony was the Holy of Holies. Into it none but the High Priest entered, and he only to make intercession for the forgiveness of sins. It is the type of the Holy of Holies above, the mercy seat in the heavens where our High Priest intercedes for us, and where the smoke of the incense of prayer arises to God.