'Heavy' in the Bible

For they bind heavy burdens that are grievous to be borne, and lay them on men's shoulders; but they themselves will not lift a finger to help them.

He came again and found them sleeping, for their eyes were heavy.

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

Now Peter and those who were with him were heavy with sleep, but when they were fully awake, they saw his glory, and the two men who stood with him.