Mark 14:40

And when he returned, he found them asleep again, (for their eyes were heavy,) neither wist they what to answer him.
— Mark 14:40, King James Version

In other translations

World English Bible (WEB)

Again he returned, and found them sleeping, for their eyes were very heavy, and they didn't know what to answer him.

American Standard Version (ASV)

And again he came, and found them sleeping, for their eyes were very heavy; and they knew not what to answer him.

Young's Literal Translation (YLT)

and having returned, he found them again sleeping, for their eyes were heavy, and they had not known what they might answer him.