They shall make an ark of acacia wood, two and a half cubits long, a cubit and a half wide, and a cubit and a half high.
AND THEY SHALL MAKE AN ARK. The plural [and ‘they’ shall make] refers back to the children of Israel mentioned above. But afterwards Scripture states: And thou shalt overlay it, And thou shalt cast for it — all in the singular, as Moses is the leader of all Israel. It is possible that [in using the plural — and they shall make] He is indicating His wish that all Israel should share in the making of the ark because it is the holiest dwelling-place of the Most High, and that they should all merit thereby [a knowledge of] the Torah. Thus the Rabbis have said in Midrash Rabbah: “Why is it that with reference to all the vessels it says, and thou shalt make, and in the case of the ark it says, and they shall make? Said Rabbi Yehudah the son of Rabbi Shalom: The Holy One, blessed be He, said, Let all the people come and engage themselves in the making of the ark, so that they should all merit [a knowledge of] the Torah.” The “engaging themselves” of which the Rabbi speaks means that they should each offer one golden vessel [for the making of the ark, in addition to their general offering for the building of the Tabernacle], or that they should help Bezalel in some small way, or that they should have intent [of heart in the making thereof].
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Rabbi Yoḥanan raised a contradiction: It is written: “And you shall make for yourself a wooden Ark” (Deuteronomy 10:1), implying that Moses alone was commanded to construct the Ark; and it is written: “And they shall make an Ark of acacia wood” (Exodus 25:10), implying that the Jewish people were all commanded to be involved in its construction. The apparent resolution to this contradiction is that although only Moses actually constructed the Ark, everyone was required to support the endeavor. So too, from here it is derived with regard to a Torah scholar that the members of his town should perform his work for him to support him and allow him to focus on his studies, since it is also the town’s responsibility to enable him to study.