Commentary for Megillah 32:15
דברי שלום ואמת אמר רבי תנחום ואמרי לה אמר רבי אסי מלמד שצריכה שרטוט כאמיתה של תורה
“Words of peace and truth”: R. Tanhum said: [or, according to some, R. Assi]: This shows that the Megillah must be written on ruled lines, like the true essence of the Torah.
Rashi on Megillah
As the Torah itself: Like [for] a Torah scroll itself, the scoring is a law of Moshe from [Mount] Sinai.
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