Exodus 19:21

and the LORD said to him, 'Go down and warn the people so they do not force their way through to see the LORD and many of them perish.

(New International Version)

Then the LORD spoke to Moses, 'Go down, warn the people, so that they do not break through to the LORD to gaze, and many of them perish.

(New American Standard Bible)

And the LORD said unto Moses, Go down, charge the people, lest they break through unto the LORD to gaze, and many of them perish.

(King James Version)