Komentarz do Wyjścia 25:5

מאדמים RED — they were dyed red after having been tanned.

ועורות תחשים, “and the skins of the tachash.” The tachash was some kind of free-roaming beast. Our sages in Shabbat 28 are of the opinion that the tachash was an animal which existed only during that generation and had a single horn on its forehead. Its whole function was to have its skin serve as one of the coverings of the Tabernacle. Apparently, the colour of their skin was so beautiful that it was not to be used again for secular purposes so that G’d allowed this animal to become extinct as soon as it had fulfilled its purpose. Our sages on that same folio explain that the fact that it had a horn on its forehead was proof that it was a ritually pure animal. According to our tradition the ox offered by Adam as a sacrifice also had only a single horn on its forehead. This is based on Psalms 69,32: “ותיטיב לה’ משור פר מקרן מפריס, “that will please the Lord more than oxen, than a bull with a horn and hooves.” The singular of the word קרן means that a particular bull had only one horn. Although the vowel pattern under the word מקרן suggests more than one, the absence of the letter י suggests that David speaks about a single-horned bull. At any rate, unless the tachash had been ritually pure, none of its parts would have qualified for use in the Tabernacle. We have a strong allusion to this in the words of Exodus 13,9 למען תהיה תורת ה’ בפיך, “so that what goes into your mouth should conform to the Torah of the Lord.” Seeing that the tachash had so many colours Onkelos translates ססגונה, “proud of its being multi-coloured.”

[They were dyed] red after they were tanned. [Rashi knows this] because if they were naturally red, it should say אֲדוּמִים , [not מְאָדָמִים ].