وإذ نتقنا الجبل فوقهم كأنه ظلة وظنوا أنه واقع بهم خذوا ما (7:171) بالانجليزي

(7:171) And recall when We shook the mountain over them as though it were a canopy, and they thought that it was going to fall over them; and We said: 'Hold firmly to that which We have given you, and remember what is in it, that you may guard against evil. *132

Tafseer Abu-al-A'la Maududi

Page 173 English Traditional

*132). The allusion here is to the event which took place when Moses proclaimed God's Divine Law at the foot of Mount Sinai.
Then Moses brought the people out of the camp to meet God; and they took their stand at the foot of the mountain. And Mount Sinai was wrapped in smoke, because the Lord descended upon it in fire; and the smoke of it went up like the smoke of a kiln, and the whole mountain quaked greatly. (Exodus 19: 17-18.)
This awesome atmosphere was created by God at the time when He made the people of Israel enter into a covenant with Him in order to impress upon them the gravity of the event and the supreme importance of the covenant. It should not be mistakenly assumed, however, that the people of Israel, who were reluctant to make the covenant, were forced to enter into it. In fact they were all believers and had gone to the Mount merely to make the covenant. The extraordinary conditions which God created were such as to make the Israelites realize that making a covenant with God was not an ordinary matter. They were rather made to feel that they were entering into a covenant with none other than Almighty God and that violating it could spell their disaster.
This concludes the discourse especially addressed to the Israelites. From here on the discourse is directed to all mankind, and particularly to the people whom the Prophet (peace be on him) addressed directly.