Parallel
Numbers 4:6
Berean Standard Bible · Westminster Leningrad Codex
They are to place over this a covering of fine leather (note: Possibly the hides of large aquatic mammals; also in verses 8, 10, 11, 12, 14, and 25; see Exodus 25:5.), spread a solid blue cloth over it, and insert its poles.
וְנָתְנ֣וּ עָלָ֗יו כְּסוּי֙ ע֣וֹר תַּ֔חַשׁ וּפָרְשׂ֧וּ בֶֽגֶד־ כְּלִ֛יל תְּכֵ֖לֶת מִלְמָ֑עְלָה וְשָׂמ֖וּ בַּדָּֽיו׃