וְהֵבִ֣יאוּ אֶת־כָּל־אֲחֵיכֶ֣ם מִכָּל־הַגּוֹיִ֣ם ׀ מִנְחָ֣ה ׀ לַֽיהוָ֡ה בַּסּוּסִ֡ים וּ֠בָרֶכֶב וּבַצַּבִּ֨ים וּבַפְּרָדִ֜ים וּבַכִּרְכָּר֗וֹת עַ֣ל הַ֥ר קָדְשִׁ֛י יְרוּשָׁלִַ֖ם אָמַ֣ר יְהוָ֑ה כַּאֲשֶׁ֣ר יָבִיאוּ֩ בְנֵ֨י יִשְׂרָאֵ֧ל אֶת־הַמִּנְחָ֛ה בִּכְלִ֥י טָה֖וֹר בֵּ֥ית יְהוָֽה׃
Y traerán á todos vuestros hermanos de entre todas las naciones, por presente á SEÑOR, en caballos, en carros, en literas, y en mulos, y en camellos, á mi santo monte de Jerusalem, dice SEÑOR, al modo que los hijos de Israel traen el presente en vasos limpios á la casa de SEÑOR.
Rashi
שש עגלת צב SIX COVERED WAGGONS — The word צב means “covered over”. Similar is, (Isaiah 66:20) “(And they shall bring all your brethren …] in covered wagons (בצבים) and upon mules”, where covered wagons are called צבים without the addition of a word denoting “wagons” (Sifrei Bamidbar 46 1).
Rabbeinu Bahya
שש עגלות צב, “six covered wagons, etc.” According to the plain meaning of the text these are a type of oxen trained to draw heavy loads, such as wagons. We find the expression in Isaiah 66,20: ובצבים ובפרדים, “in drays and mules.” Alternatively, the word is related to the word צבה in Numbers 5,21 where it refers to something swollen. Here it means the wagons were fully loaded.
Tur HaArokh
ויביאו את קרבנם, “they brought their offering, etc.” Nachmanides, in justifying the Torah’s referring to the wagons presented by the princes as קרבן, a sacrificial offering, writes that seeing that these wagons were an indispensable part of the entire process known as service involving sacrificial offerings, claims that their description is קרבן are quite correct. He cites as proof for his approach Numbers 31,50 ונקרב את קרבן ה' איש אשר מצא כלי זהב וגו', “we have brought an offering each man who has found golden vessels [in the loot of the war against the Midianites. Ed.] There too the term קרבן, is applied to man-made items. The gold in question was brought as a gift to the Temple treasury. It appears that what motivated the princes to bring the wagons was that they could not imagine that the Levites would be able to carry all these heavy beams on their shoulders, nor that they would be able to carry the heavy silver sockets of each of those beams. They therefore brought these wagons without their having been requested. It was customary in those days that Royalty and similarly highly placed individuals would transport their belongings on wagons. It is also possible to interpret the words ויביאו את קרבנם לפני ה' שש עגלות צב וגו', to mean that the six wagons transported the sacrificial offerings of the princes, whereas the 12 oxen transported the wagons. The oxen and wagons came to a halt before the entrance of the Tabernacle, and then G’d commanded Moses to also accept the oxen and the wagons from them as gifts for the Temple treasury. As a result, both the oxen and the wagons now became לעבוד את עבודת המשכן “tools to perform the service connected with the work connected with the Tabernacle.” Subsequently, the princes took their respective sacrificial offerings and presented them in front of the Altar. They had meant originally to all present all their offerings on that very day. At this point in time, G’d told Moses that they were to present these offerings one prince at a time, one day at a time. This is why there was no need for the Torah to write קח מאתם, “accept it from them,” in connection with the princes’ respective sacrificial offerings. Why would Moses not accept these offerings until G’d had given him specific instructions to accept them? What they had been doing was no more than commonplace; however, in connection with the oxen [too old for the Altar as animal sacrifices, Ed.] as well as for the wagons Moses did have to have special instructions to accept these also. It is a norm in our holy tongue to describe even what is being transported on the wagons as being a part of the wagons, similar to when the prophet in Kings I 18,19 speaks of אוכלי שולחן איזבל, which, of course does not mean that “people were eating Izzevel’s table,” but that “people were eating food at Izzevel’s table.” It is possible that the meaning of the word צב in our context is: “loaded with,” as in Isaiah 66,20 where these “covered wagons“ are understood as being loaded with many travelers each. In that case the Torah describes the six wagons as fully loaded with the various sacrificial offerings of the princes.
Rashi
I will remind Rahab and Babylon of My beloved ones This too He spoke of You: I shall remind Egypt and Babylon of My beloved ones, to bring them as a gift, as the matter that is stated (Isa. 66: 20): “And they will bring all your brethren, etc., a tribute to the Lord.”