The Prophet ﷺ recited this verse, "And when his Lord revealed Himself to the mountain, He made it crumble to dust" [Araf 7:143].Hammad demonstrated like this, and Sulayman placed the tip of his thumb on the joint of his right finger. He said, "So the mountain sank, 'and Musa fell down unconscious'" [Araf 7:143].
حدثنا عبد الله بن عبد الرحمن أخبرنا سليمان بن حرب حدثنا حماد بن سلمة عن ثابت
أن النبي ﷺ قرأ هذه الآية {فلما تجلى ربه للجبل جعله دكا} قال حماد هكذا وأمسك سليمان بطرف إبهامه على أنملة إصبعه اليمنى قال فساخ الجبل {وخر موسى صعقا}
This has a sahih isnad. Ahmad: 3/125 narrated it from Muaz bin Muaz through the same route.