Are you thinking of 7:143 about Prophet Moses?
7:142 We summoned Moses for thirty nights and completed them by adding ten. Thus We completed the term with His Lord, forty nights. Before leaving for Mount Sinai, Moses assigned his brother Aaron, as his deputy and told him to keep social order after him and not to be intimidated by trouble makers. [2:51]
7:143 When Moses arrived at the appointed time, and his Lord spoke to him, Moses said, "My Lord! Give me the power to better perceive You." His Lord said, "You will not perceive Me unless you look pensively at the mountain. If it remains firm in its place, then shall you perceive Me." (You will realize that even a single mountain is made of countless particles that were scattered as dust and it is your Lord Who has made it stand firm.) Thus did his Lord choose for the mountain to be a manifestation of His glory. Moses pictured the mountain as dust and was stunned! When he recovered his senses, he said, "Infinite are You in Your glory! I turn to you repentant and I am among the foremost believers.”
[Moses had only perceived that the mountain had crumbled to dust. The 7,359 feet high Mount Sinai is standing to this day and houses the ancient and famous St. Catherine’s Monastery. Therefore, contrary to popular literal translation of this verse, its understanding in allegorical terms is preferred. Also, a Prophet of God is least likely to make a demand to see God in physical form. See 2:55, 2:118, 7:155.
Now let us suppose that it was some other mountain that had crumbled to dust. In that case, the place would most certainly have become the greatest historical relic of all times. As I have stated in preface to QXPi, the earliest Tafseers of the Qur’an were written centuries after the exalted Prophet. By then the Ajami (Zoroastrian-Persian, alien) politics and culture dominated the Islamic Empire centered in Baghdad. It is a hard fact of the historical dynamics that the rulers' political supremacy profoundly affects the culture and language of the entire nation. Just as an example, Khalifa Haroon Rasheed's mother Khaizran was a Zoroastrian (Parsi or Maggian), and so were his wives. Khaizran’s son, the succeeding Khalifa Mamoon's wives were also Ajami. Even the Baramakah, the viziers of the Empire were Ajamis. So, the Zoroa-Persian concepts left a very heavy impact on the Arabic language, giving Ajami (alien) concepts even to the Qur’anic themes and terminology - So much so that they became Ma’roof (generally recognized and well-accepted). Let us see how our clergy handled this verse. They had the unchangeable Qur’an before them, but the concepts they adopted were foreign and pliable like wax. A Hadith was concocted in the name of the exalted Messenger. Here it is as related by a recent Mullah: "The Prophet, after reciting this verse (7:143), placed his thumb on the little finger and said that only this much of the light of God had touched the mountain. Therefore, only that much portion (the size of a little finger) of the mountain was affected."
- Ma'arifil Qur’an, Mufti Aazam (the Chief Mufti) of Pakistan, ‘Maulana’ Mufti Muhammad Shafi; tafseer of 7:143 vol 4 - quoting Anas bin Malik from the ancient Tirmizi, Hanbal and Hakam. Whoever made up this Hadith forgot that the wrong Ajami translations talk of the whole mountain crumbling to dust!
- Tafheem by Maududi: It is even more surprising to see Mullah Maududi's TAFHEEM drawing a beautiful map of the mountain (that he must have seen as I did) housing the ancient monastery and yet, writing that the mountain was reduced to dust – ‘raiza raiza ho gaya’]
Here are 2:258-9 about Prophet Abraham:.
2:258 Have you not thought of the one who argued with Abraham about his Lord because God had given him kingship? Abraham said to him, “My Lord is He Who gives life and causes death." He answered, “I give life and cause death.” Abraham said, “God makes the sun rise from the East; make it rise from the West.” Thereupon the rejecter remained dumbfounded. God does not guide people who choose to do wrong. [Nimrod Shaddad, King of Babylon, Abraham’s contemporary and staunch enemy, used to proclaim divinity. Being a tyrant he could impose or revoke death penalty]
2:259 (Later on, came another king in the dynasty of Nimrods, his name, Nebuchadnezzar, 630-562 BC. He invaded Jerusalem, oppressed Israelites and enslaved them. One hundred years of tribulation passed before King Cyrus of Persia liberated them and reinstated them back in Jerusalem. The similitude of this history is as if) Someone passes by the ruins of a town and wonders if that town could ever come back to life again, and God causes him to die for a hundred years and then revives him. He thinks it was only a matter of a day or a part of it. He even finds his food, drink, and donkey standing beside him. God creates you in the wombs of your mothers, in bone and flesh. And when the matter became clear to him, he said, “I know now that God is Able to do all things. God is the all Powerful Designer of His Laws and He does all things in the Universe in duly appointed measures.” [13:18, 25:2, 65:3, 54:49]
Here is 42:51 mentioned by Br Asghar:
42:51 And it is not for any human being that God should speak to him other than through direct Revelation (on the hearts of His Messengers) or from behind a barrier (such as at Mount Sinai to Moses) or by sending a Messenger to convey His Words with His Permission (as all Messengers did). He is the Most High, Wise. [2:97, 2:253, 4:164]