Mark 9:6

For he wist not what to say; for they were sore afraid.
— Mark 9:6, King James Version

In other translations

World English Bible (WEB)

For he didn't know what to say, for they were very afraid.

American Standard Version (ASV)

For he knew not what to answer; for they became sore afraid.

Young's Literal Translation (YLT)

for he was not knowing what he might say, for they were greatly afraid.