Mark 9:6
For he wist not what to say; for they were sore afraid.
In other versions
For he knew not what to answer; for they became sore afraid.
ASV
Because he was not certain what to say, for they were in great fear.
BBE
For he knew not what he should say, for they were filled with fear.
DBY
For he didn't know what to say, for they were very afraid.
WEB
for he was not knowing what he might say, for they were greatly afraid.
YLT
For he knows not what to say; for they were sore afraid.
ENG
For he knew not what to say: for they were greatly terrified.
WBT
For they were all so terrified that Peter did not know what else to say.
BSB
In context
4And there appeared unto them Elias with Moses: and they were talking with Jesus.
5And Peter answered and said to Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias.
6For he wist not what to say; for they were sore afraid.
7And there was a cloud that overshadowed them: and a voice came out of the cloud, saying, This is my beloved Son: hear him.
8And suddenly, when they had looked round about, they saw no man any more, save Jesus only with themselves.