(Devarim 17:18) "And it shall be when he shall sit on the throne of his kingdom": If he does all that is written in this regard, he is worthy of sitting on the throne of his kingdom.

"that he shall write for himself the mishneh of this Torah": expressly for himself; he is not to "bedizen" himself with those of his ancestors. "

mishneh": This tells me only of mishneh Torah ("the repetition of the Torah," i.e., the book of Devarim). Whence do I derive (that the mitzvah applies also) to the rest of the Torah? From (Ibid. 19) "to heed all the words of this Torah." If so, why is it written "the mishneh of this Torah"? Because it (i.e., the script) is destined to change (viz. Ezra 4:7 and Daniel 5:8).

Others say: On the day of Hakhel (viz. Ibid. 21:12) only mishneh Torah (Devarim) is to be read (and it is to this Hakhel reading that our verse is alluding.)

"on a scroll": and not on a tablet and not on paper, but only on a megillah (a scroll).

"before the Cohanim, the Levites": from the scroll in the azarah (the Temple court).

“On a document” (Dt.17:18)— on the skin of a clean animal. And they correct it against Ezra’s scroll, supervised by the Court of Seventy One **[which met in the Chamber of Carved Stone].**¹⁰⁷

footnotes: ¹⁰⁷ Cf. T. San.4:7.

“Before the levitical Priests” (Dt.17:18)—

**[But for their intervention,] the Torah would have been forgotten!**¹⁰⁸ 157.4.

footnotes: ¹⁰⁸ Cf. T. Edu.1:1 and Pisqa’