Read Mark 14:40 Using Other Translations
And when he returned, he found them asleep again, (for their eyes were heavy,) neither wist they what to answer him.
And again he came and found them sleeping, for their eyes were very heavy, and they did not know what to answer him.
When he returned to them again, he found them sleeping, for they couldn’t keep their eyes open. And they didn’t know what to say.