Mark 9:4

4 And there appeared to them Elijah with Moses, who were talking with Jesus.

Mark 9:4 Meaning and Commentary

Mark 9:4

And there appeared unto them Elias with Moses
Or Moses and Elias, as all the Oriental versions read, as in Mt. 17:3, (See Gill on Matthew 17:3):

and they were talking with Jesus;
concerning his decease, and what he was to do and suffer at Jerusalem, and of which he himself had lately talked with his disciples; so that this might have been a confirmation of these things to them; (See Gill on Matthew 17:3).

Mark 9:4 In-Context

2 Six days later, Jesus took with him Peter and James and John, and led them up a high mountain apart, by themselves. And he was transfigured before them,
3 and his clothes became dazzling white, such as no one on earth could bleach them.
4 And there appeared to them Elijah with Moses, who were talking with Jesus.
5 Then Peter said to Jesus, "Rabbi, it is good for us to be here; let us make three dwellings, one for you, one for Moses, and one for Elijah."
6 He did not know what to say, for they were terrified.