https://www.biblegateway.com/passage/?search=Jude+1%3A14-15&version=NET
Jude 14-15
New English Translation
14 Now Enoch, the seventh in descent beginning with Adam,[a] even prophesied of them,[ b] saying, “Look! The Lord is coming[c] with thousands and thousands[d] of his holy ones, 15 to execute judgment on[e] all, and to convict every person[f] of all their thoroughly ungodly deeds[g] that they have committed,[h] and of all the harsh words that ungodly sinners have spoken against him.”[ i]
d. Jude 1:14 tn Grk
“ten thousands.” The word μυριάς (murias), from which the English myriad is derived, means “ten thousand.” In the plural it means “ten thousands.” This would mean, minimally, 20,000 (a multiple of ten thousand). At the same time, the term was often used in apocalyptic literature to represent simply a rather large number, without any attempt to be specific.