Luke 9:32

“But Peter, and they that were with him, etc.] The other two disciples, James and John; were heavy with sleep; as they afterwards were in the garden, while Christ was praying, as he had been now; being weary with the labours of the day past, and it being now night, as is very probable, since that was an usual time Christ spent in prayer: and when they were awake, The Syriac version reads, “scarcely awake”; they were so heavy with sleep, that it was with difficulty they were awaked out of it, even by the rays of light and glory that were about them. The Ethiopic version adds, “suddenly”; such a lustre darted from these glorious forms, especially from the body of Christ, as at once surprised…”

“and when they were awake--so, certainly, the most commentators: but if we translate literally, it should be "but having kept awake" [MEYER, ALFORD]. Perhaps "having roused themselves up" [OLSHAUSEN] may come near enough to the literal sense; but from the word used we can gather no more than that they shook off their drowsiness. It was night, and the Lord seems to have spent the whole night on the mountain (Luk 9:37). saw his glory, &c.--The emphasis lies on "saw," qualifying them to become "eye-witnesses of His majesty" (Pe2 1:16).”

“See an account of the transfiguration in Matthew 17:1-13, and Mark 9:2-13. Luke 9:29 The fashion - The “appearance.” Glistering - Shining like lightning - of a bright, dazzling whiteness. As Mark says, “more white than any fuller could make it.” Luke 9:31 In glory - Of a glorious appearance. Of an appearance like that which the saints have in heaven. His decease - literally, his “exit” or “departure.” The word translated here “decease” - that is, exit, or “going out” - is elsewhere used to denote death. See 2 Peter 1:15. Death is a departure or going out from this life. In “this” word there may be an allusion to the “departure” of the children of Israel from Egypt. As that was going out from…”

“They saw his glory - The very same expression in which it is described by St. John, Joh 1:14; and by St. Peter, Pe2 1:16. Luke 9:34”

“were heavy: Luk 22:45, Luk 22:46; Dan 8:18, Dan 10:9; Mat 26:40-43 they saw: Exo 33:18-23; Isa 60:1-3, Isa 60:19; Joh 1:14, Joh 17:24; Pe2 1:16; Jo1 3:2; Rev 22:4, Rev 22:5 Luke 9:33”