וְאַתָּ֞ה דַּבֵּ֨ר אֶל־בְּנֵ֤י יִשְׂרָאֵל֙ לֵאמֹ֔ר אַ֥ךְ אֶת־שַׁבְּתֹתַ֖י תִּשְׁמֹ֑רוּ כִּי֩ א֨וֹת הִ֜וא בֵּינִ֤י וּבֵֽינֵיכֶם֙ לְדֹרֹ֣תֵיכֶ֔ם לָדַ֕עַת כִּ֛י אֲנִ֥י יְהוָ֖ה מְקַדִּשְׁכֶֽם׃
「你要告訴以色列人說：『但你們務必遵守我的安息日，因為這是我與你們之間世世代代的記號，使人知道我是使你們成為聖潔的永恆者。
The Jewish Spiritual Heroes
Rabbi Jose followed in the footsteps of Rabbi Akiba in the matter of expounding every saying of the Torah which might have seemed to be superfluous. Thus he explained the verse “but my Sabbaths you shall observe” (Ex. 31:13) to indicate that certain labors may be performed on the Sabbath such as work in the Temple or in order to save a human life. This interpretation he based on the word ״אך״ in the Hebrew text.8)תוספתא שבת פרק ט״ז.