וַיִּשְׂא֣וּ בְנֵֽי־הַלְוִיִּ֗ם אֵ֚ת אֲר֣וֹן הָֽאֱלֹהִ֔ים כַּאֲשֶׁ֛ר צִוָּ֥ה מֹשֶׁ֖ה כִּדְבַ֣ר יְהוָ֑ה בִּכְתֵפָ֥ם בַּמֹּט֖וֹת עֲלֵיהֶֽם׃ (פ)
Rashi on I Chronicles
according to the word of the Lord, on their shoulders to carry it, not actually on their shoulders, but with staves upon them.