Deuteronomy 5:19

ולא יסף — We render this in the Targum by ולא פסק “and He did not cease”, — [Because it is characteristic of human beings that they are unable to utter all their words in one breath (but must make pauses) and it is characteristic of the Holy One, blessed be He, that this is not so, therefore He did not pause, and since He did not pause, He did not have to resume], — for His voice is strong and goes on continuously (Sanhedrin 17a). Another explanation of ולא יסף: He did not again ever reveal himself with such publicity.

אֶֽת־הַדְּבָרִ֣ים הָאֵ֡לֶּה דִּבֶּר֩ יְהֹוָ֨ה אֶל־כׇּל־קְהַלְכֶ֜ם בָּהָ֗ר מִתּ֤וֹךְ הָאֵשׁ֙ הֶֽעָנָ֣ן וְהָֽעֲרָפֶ֔ל ק֥וֹל גָּד֖וֹל וְלֹ֣א יָסָ֑ף וַֽיִּכְתְּבֵ֗ם עַל־שְׁנֵי֙ לֻחֹ֣ת אֲבָנִ֔ים וַֽיִּתְּנֵ֖ם אֵלָֽי׃

These words the Lord spoke to all your assembly in the mountain out of the midst of the fire, the cloud, and the thick darkness, with a great voice which was not heard again. And he wrote them on two tablets of stone, and delivered them to me.