Parashas Bamidbar
וְכִלָּ֣ה אַֽהֲרֹן־וּ֠בָנָ֠יו לְכַסֹּ֨ת אֶת־הַקֹּ֜דֶשׁ וְאֶת־כׇּל־כְּלֵ֣י הַקֹּ֘דֶשׁ֮ בִּנְסֹ֣עַ הַֽמַּחֲנֶה֒ וְאַחֲרֵי־כֵ֗ן יָבֹ֤אוּ בְנֵי־קְהָת֙ לָשֵׂ֔את וְלֹֽא־יִגְּע֥וּ אֶל־הַקֹּ֖דֶשׁ וָמֵ֑תוּ אֵ֛לֶּה מַשָּׂ֥א בְנֵֽי־קְהָ֖ת בְּאֹ֥הֶל מוֹעֵֽד׃
bContinuing v. 4. When Aaron and his sons have finished covering the sacred objects and all the furnishings of the sacred objects at the breaking of camp, only then shall the Kohathites come and lift them, so that they do not come in contact with the sacred objects and die. These things in the Tent of Meeting shall be the porterage of the Kohathites.
Torah Temimah points to R’ Elazar — Shabbos related / TT (verified).
משא בני קהת — תניא, א״ר אלעזר: המוציא משא בשבת למעלה מעשרה טפחים חייב.
English: “The burden of the sons of Kehas” — it was taught: R’ Elazar said: One who carries a burden on Shabbos higher than ten handbreadths is liable.
Custom
Chazal use the Kehasite carrying method as a paradigm for liability in carrying on Shabbos.