וּבִימֵ֣י אַרְתַּחְשַׁ֗שְׂתָּא כָּתַ֨ב בִּשְׁלָ֜ם מִתְרְדָ֤ת טָֽבְאֵל֙ וּשְׁאָ֣ר כנותו [כְּנָוֺתָ֔יו] עַל־ארתחששתא [אַרְתַּחְשַׁ֖שְׂתְּ] מֶ֣לֶךְ פָּרָ֑ס וּכְתָב֙ הַֽנִּשְׁתְּוָ֔ן כָּת֥וּב אֲרָמִ֖ית וּמְתֻרְגָּ֥ם אֲרָמִֽית׃ (פ)
А во дни Артаксеркса писал Бишлам, Митредат, Табил и остальные его сподвижники Артаксерксу, царю Персии; и написание письма было написано на арамейском языке и изложено на арамейском языке.
Mishnah Yadayim
The Aramaic sections in Ezra and Daniel defile the hands. If an Aramaic section was written in Hebrew, or a Hebrew section was written in Aramaic, or [Hebrew which was written with] Hebrew script, it does not defile the hands. It never defiles the hands until it is written in the Assyrian script, on parchment, and in ink.