Rashi on Exodus 20:17/רש"י על שמות כ׳:י״ז

1לבעבור נסות אתכם signifies, in order to exalt you in the world (Mekhilta) — that you may obtain a great name amongst the nations because He has revealed Himself to you in His Glory.

2נסות has the sense of exalting and greatness, of similar meaning and root to, (Isaiah 62:10) “Lift up an ensign (נס)”; (Isaiah 49:22) “I will lift up my standard (נסי)”; (Isaiah 30:17) “as an ensign (כנס) on a hill” — and an ensign is called נס because it is something raised on high.

3ובעבור תהיה יראתו AND THAT HIS FEAR MAY BE [BEFORE YOUR FACES] — Through the fact that you see that He is feared and dreaded you will know that there is none beside Him and you will therefore fear Him and not sin.