וישכימו. הַשָּׂטָן זֵרְזָם, כְּדֵי שֶׁיֶּחֶטְאוּ: וישכימו AND THEY ROSE UP EARLY [IN THE MORNING] — Satan made them zealous in order that they might sin, for later on in the forenoon Moses actually came down from the mountain.
לצחק. יֵשׁ בְּמַשְׁמַע הַזֶּה גִּלּוּי עֲרָיוֹת, כְּמוֹ שֶׁנֶּ' לְצַחֶק בִּי (בראשית ל"ט), וּשְׁפִיכוּת דָּמִים, כְּמוֹ שֶׁנֶּ' יָקוּמוּ נָא הַנְּעָרִים וִישַׂחֲקוּ לְפָנֵינוּ (שמואל ב ב'), אַף כָּן נֶהֱרַג חוּר (שמות רבה): לצחק TO PLAY — There is implied in this term besides idolatry also sexual immorality, — as we find the word used in, (Genesis 39:17) “to mock (לצחק) me” where unchastity is meant as is evident from the context — and blood-shed, as it is said, (II Samuel 2:14) “Let the young men arise and play (וישחקו) before me; [and they caught every one his fellow by the head and thrust his sword in his fellows side]”— here, too, Hur was assassinated (Midrash Tanchuma 3:9:20).