Jude 14-15 does not have reference to the "saints" (Jesus' bride): it is a text that refers to the holy angels who accompany God when He destroys every last vestige of this ungodly age during his fateful day of vengeance (Isa. 34:1-8). hAGIAIS MURIASIN AUTOU does not refer to the Christian EKKLHSIA as such. From a literary-historical perspective, Enoch, who spoke this prophecy, knew nothing concerning any bride of Christ. At most, resurrected anointed Christians may be peripherally included in the formula recorded by Jude, but it is more likely that Jude 14-15 is talking about the holy angels of YHWH. Other usages of this linguistic formula seem to bear out this point. See Deut. 33:1-2; Habakkuk 3:3-4; Zech. 14:1-5.
Henry Alford applies Jude 14-15 to angels, and includes Heb. 12:23 as a reference.
Meyer's NT Commentary:
ἐν ἁγίαις μυριάσιν] comp. Zechariah 14:5; Deuteronomy 33:2; Hebrews 12:22; (μυριάσιν ἀγγέλων) Revelation 5:11.