וְאַתָּ֣ה בֶן־אָדָ֔ם הִנָּבֵ֖א אֶל־הָרֵ֣י יִשְׂרָאֵ֑ל וְאָ֣מַרְתָּ֔ הָרֵי֙ יִשְׂרָאֵ֔ל שִׁמְע֖וּ דְּבַר־יְהוָֽה׃
Y TÚ, hijo del hombre, profetiza sobre los montes de Israel, y di: Montes de Israel, oid palabra de SEÑOR:
Mishnah Eruvin
They measure the Shabbat limit only with a rope fifty cubits long, neither less nor more. And one should measure only while holding the end of the rope on a level with his heart. If he was measuring and he reached a valley or a wall he spans it and resumes his measuring. If he reached a hill he spans it and resumes his measuring, provided he does not go beyond the Shabbat limit. If he is unable to span it in connection with this Rabbi Dostai ben Yannai stated in the name of Rabbi Meir: “I have heard that they pierce the hills.”