Hebrews 12:21

And so terrible was the sight, that Moses said, I exceedingly fear and quake:)

and so fearful was the appearance, that Moses said, "I am terrified and trembling."

and so fearful was the appearance, `that' Moses said, I exceedingly fear and quake:

and, (so terrible was the sight,) Moses said, `I am fearful exceedingly, and trembling.'

The sight was so terrifying that even Moses said, “I am trembling with fear.”