Exodus 20:1

וידבר אלהים AND GOD SPAKE — The word אלהים is a term for a judge. Since there are chapters in the Torah of such a character that if a person observes the commands contained therein he will receive a reward and if he never observes them at all) he will not receive punishment on their account, one might think that the Ten Commandments are also of such a character (that no punishment will follow upon the infringement of them); therefore Scripture expressly states, “God spake” — God Who is Judge, exacting punishment (Mekhilta). את כל הדברים האלה ALL THESE WORDS — This statement (that God spake all these words) tells us that the Holy One, blessed be He, said all these words in one utterance, something that is impossible to a human being to do — to speak in this manner. Now if this be so, why does Scripture again say the first two Commandments, אנכי and לא יהיה לך? But the explanation is that He repeated and expressly uttered each of these two commandments by itself (Mekhilta). לאמר lit., TO SAY — This expression teaches us that they answered to that which required the reply “Yea” (אנכי) by “Yea” and to that which required the reply “Nay” (לא יהיה) by “Nay” (Mekhilta).

וַיְדַבֵּ֣ר אֱלֹהִ֔ים אֵ֛ת כׇּל־הַדְּבָרִ֥ים הָאֵ֖לֶּה לֵאמֹֽר׃ {ס}        

And God spoke all these words, saying,