Revelation 15:5

After these things
Μετὰ ταῦτα [Meta tauta] , the standard phrase John uses to demarcate sections of his vision (Rev. Rev. 1:19+; Rev. 4:1+; Rev. 7:1+, Rev. 7:9+; Rev. 9:12+; Rev. 15:5+; Rev. 18:1+; Rev. 19:1+). The worshipers upon the sea of glass are seen after the Beast has initiated his mark, but before the pouring forth of the final seven bowls of wrath. If the worship of the Beast and institution of his mark occur at the mid-point of The 70th Week of Daniel, this indicates that the bowls of wrath are poured forth as part of the last half of the Tribulation. See Events of the 70th Week of Daniel. the temple of the tabernacle of the testimony in heaven
Tabernacle is σκηνῆς [skēnēs] , which denotes God’s dwelling place. Of the testimony is τοῦ μαρτυρίου [tou martyriou] , which can also be translated of the witness (Num. Num. 18:2). The term testimony or witness referred primarily to the tablets of the Ten Commandments which stood as a witness of the Mosaic Covenant and the entire body of Mosaic Law which Israel came under at Mount Sinai. “And you shall put into the ark the Testimony which I will give you” (Ex. Ex. 25:16). This testimony set forth God’s law, especially as embodied by the Ten Commandments, and now stands as a witness against the immoral actions of the nations in their rejection of God. The “tabernacle of the Testimony” (Ex. Ex. 38:21) was the meeting place, also called “the tabernacle of meeting” (Ex. Ex. 30:26), where God would meet with the children of Israel. It contained “the ark of the Testimony” (Ex. Ex. 30:26; Ex. 21:7) from which it derived the name tabernacle of the Testimony. The Levites were entrusted with the service of the tabernacle of the Testimony, to transport and attend to it (Num. Num. 1:50). God’s presence dwelt between the cherubim over the mercy seat of the ark within the tabernacle. The earthly tabernacle was patterned after the temple of the tabernacle of the testimony in heaven. See A Heavenly Pattern. See The Abiding Presence of God. See Tabernacle in the Wilderness. When the heavenly temple was last opened, the ark of His covenant (the “testimony” ) was seen together with manifestations of judgment (Rev. Rev. 11:19+). The same idea is present here. Whatever is about to come forth from the temple is a manifestation of God’s judgment for those who fall short of the testimony (witness) of the law and who have not sought Christ for refuge from God’s wrath. The righteous requirement of the law judges those who are guilty and under judgment of God’s wrath (Rom. Rom. 2:12; Rom. 3:19-20). For “the law brings about wrath” (Rom. Rom. 4:15). Believers will not be subject to the written requirements which were taken away in Christ (Rom. Rom. 7:6; Col. Col. 2:14). See commentary on Revelation 11:19.