'Heavy' in the Bible

Come unto me, all ye that labor and are heavy laden, and I will give you rest.

Yea, they bind heavy burdens and grievous to be borne, and lay them on men's shoulders; but they themselves will not move them with their finger.

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

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

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