Luke 9:34

34 and as he was speaking these things, there came a cloud, and overshadowed them, and they feared in their entering into the cloud,

Luke 9:34 Meaning and Commentary

Luke 9:34

While he thus spake there came a cloud
While Peter was making the above request, before an answer was returned, a cloud appeared, a very uncommon one, as a symbol of the divine presence: "and overshadowed them"; Jesus, Moses, Elias, and the disciples:

and they feared as they entered into the cloud;
either as they themselves entered into it, that coming gradually over them, because of the glory of it, and the solemnity that attended it; or as Moses and Elias entered into it; and so the Syriac and Persic versions read, "they feared when they saw Moses and Elias enter into the cloud"; which took them out of their sight: just as the cloud received Jesus out of the sight of his disciples, when he ascended to heaven, ( Acts 1:9 ) .

Luke 9:34 In-Context

32 but Peter and those with him were heavy with sleep, and having waked, they saw his glory, and the two men standing with him.
33 And it came to pass, in their parting from him, Peter said unto Jesus, `Master, it is good to us to be here; and we may make three booths, one for thee, and one for Moses, and one for Elijah,' not knowing what he saith:
34 and as he was speaking these things, there came a cloud, and overshadowed them, and they feared in their entering into the cloud,
35 and a voice came out of the cloud saying, `This is My Son -- the Beloved; hear ye him;'
36 and when the voice was past, Jesus was found alone; and they were silent, and declared to no one in those days anything of what they have seen.
Young's Literal Translation is in the public domain.