Betzalel knew the permutation of letters
In the book of Rabbi Hamnuna Saba (the elder), we learn here, it speaks of the two letters Chet ח and Tet ט, which are in the word for 'sin'. These letters are withheld from the tribes of Yisrael, so that they should not be marked with sin. In the tabernacle all the letters of the alphabet are engraved, as is the secret of the Holy Name, Yud Hei Vav Hei י.ה.ו.ה. (The Tetragrammaton). Betzalel, who knew the Wisdom of joining the letters with which heaven and earth were created, was chosen above by God, and was also chosen below. His name, we are told, means "In the shadow of El." We next read of the meaning of "The son of Uri" and of "the son of Chur," which has two explanations. Finally, we are told that Betzalel was appointed over the tribe of Judah.
The wisdom distilled here concerning the mystical letters Chet and Tet absolves us of our sins, from the time of Adam to the present moment, while finally doing away with our tendencies to err and commit transgressions. The four-letter Tetragrammaton י.ה.ו.ה., we are told, embodies all the secrets of Creation, the world above and the world below. Thus, the Light that permeates all reality now rejuvenates our soul and uplifts all existence. Our consciousness is liberated from the rational-based, self-centeredness of Satan - the Evil Inclination - by means of the Light of Binah (the son of Chur).
476. In the book of Rav Hamnuna Saba (the elder), IT IS WRITTEN THAT THE WORD, 'CHET (ENG. 'SIN')' contains the two letters Chet and Tet. Therefore, they were not written in the Onyx Stones and in the stones to be set, because the tribes of Yisrael had these two letters withheld from them, so that there should not be marked in them Chet Tet, MEANING SIN.
476. וּבְסִפְרָא דְּרַב הַמְנוּנָא סָבָא, הָכָא אִינּוּן תְּרֵין אַתְוָון: ח,' ט.' וְעַל דָּא לָא הֲווֹ כְּתִיבִין גּוֹ אַבְנֵי בּוּרְלָא, אֲבָנִין דְּאַשְׁלָמוּתָא, וּשְׁבָטִין דְּיִשְׂרָאֵל, תְּרֵין אַתְוָון אִלֵּין אִתְמְנָעוּ מִנַּיְיהוּ, בְּגִין דְּלָא יְהֵא רָשִׁים בְּגַּוַּויְיהוּ חֵ"ט.
477. All the letters of the alphabet are suspended in the site of the Temple in engraved secrets of the Holy Names, bound and embroidered on it. And the entire world of above and below is bordered and engraved in the secret of the letters, and the secret of the supernal Holy Name, NAMELY, YUD HEI VAV HEI is engraved on them.
477. בְּאֲתָר דְּבֵי מַקְדְּשָׁא תַּלְיָין כָּל אַתְוָון דְּאַלְפָא בֵּיתָא, בְּרָזִין גְּלִיפָן דִּשְׁמָהָן קַדִּישִׁין, קְשִׁירִין, מְרֻקָּמָן עָלֵיהּ, וְכָל עָלְמָא דִּלְעֵילָּא וְתַתָּא, כֹּלָּא בְּרָזָא דְּאַתְוָון מִתְחַקְקָן וּגְּלִיפָא, וְרָזִין דִּשְׁמָא קַדִּישָׁא עִלָּאָה, עָלַיְיהוּ אִתְגְּלִיף.
478. In the tabernacle, the letters were engraved and formed properly, because Betzalel knew the Wisdom of permutating the letters with which the heaven and earth were created. Because of his Wisdom, the tabernacle was build by him and he was chosen from among all the people of Yisrael.
478. בְּמַשְׁכְּנָא אִתְגְּלִיפוּ וְאִתְצָיָירוּ אַתְוָון כַּדְקָא חֲזִי. דְּהָא בְּצַלְאֵל הֲוָה יָדַע חָכְמְתָא, לְצָרְפָא אַתְוָון דְּאִתְבְּרִיאוּ בְּהוּ שְׁמַיָא וְאַרְעָא. וְעַל חָכְמְתָא דִּילֵיהּ, אִתְבְּנֵי מַשְׁכְּנָא עַל יְדֵיהּ, וְאִתְבְּרִיר מִכָּל עַמָּא דְּיִשְׂרָאֵל.
479. He was chosen above and so did the Holy One, blessed be He, want him to be chosen below, as it is written THAT THE HOLY ONE, BLESSED BE HE, SAID TO MOSES, "See I have called by name Betzalel" (Shemot 31:2). MOSES SAID TO YISRAEL, "See, Hashem has called by name Betzalel" (Shemot 35:30). His name is in a supernal secret called 'Betzalel,' WHICH MEANS Betzel (Eng. 'in the shadow') of El. Who is he? He is Righteous, MEANING YESOD, who sits in that shadow of El that is called 'supernal El,' MEANING TIFERET. He, BETZALEL, is placed like that El, WHO IS TIFERET, as that El takes six extremities, BECAUSE TIFERET TAKES SIX EXTREMITIES, CHESED, GVURAH, TIFERET NETZACH, HOD AND YESOD, and the Righteous, WHO IS YESOD, takes them. So that El illuminates above and this Righteous One illuminates below, TO MALCHUT. That El, WHO IS TIFERET, combines six ends, while that Righteous one is the combination of all six ends.
479. וּכְמָה דְּאִיהוּ אִתְבְּרִיר לְעֵילָּא, הָכִי בָּעָא קוּדְשָׁא בְּרִיךְ הוּא דְּיִתְבְּרִיר לְתַתָּא. לְעֵילָּא כְּתִיב, רְאֵה קָרָאתִי בְשֵׁם בְּצַלְאֵל. לְתַתָּא רְאוּ קָרָא יְיָ' בְּשֵׁם בְּצַלְאֵל. וּשְׁמֵיהּ בְּרָזָא עִלָּאָה אִקְרֵי הָכִי בְּצַלְאֵל: בְּצֵל אֵל. וּמַאן אִיהוּ. דָּא צַדִּיק. דְּאִיהוּ יָתִיב בְּצֵל אֵל, הַהוּא דְּאִקְרֵי אֵל עֶלְיוֹן. וְאִיהוּ יָתִיב כְּגַוְונָא דְּהַהוּא אֵל. הַהוּא אֵל נָטִיל שִׁית סִטְרִין, הַהוּא צַדִּיק נָטִיל לוֹן. אוּף הָכִי, הַהוּא אֵל אַנְהִיר לְעֵילָּא, הַאי צַדִּיק אַנְהִיר לְתַתָּא. הַהוּא אֵל, כְּלָלָא דְּכֻלְּהוּ שִׁית סִטְרִין. הַהוּא צַדִּיק, כְּלָלָא דְּכֻלְּהוּ שִׁית סִטְרִין.
480. "The son of Uri" (Ibid.) MEANS the son of the primordial light (Heb. or) that the Holy One, blessed be He, created during the work of Creation. "The son of Chur" (Ibid.) MEANS the son of the freedom (Heb. cherut) in everything, NAMELY THE LIGHT OF BINAH, WHICH IS THE SECRET OF FREEDOM. Another explanation, "The son of Chur" means the son who is white (Heb. chiver) MEANING white of all the colors, MEANING THAT THE LIGHT OF CHASSADIM, WHICH IS WHITE, IS IN ASCENDANCY IN HIM. And he, BETZALEL, WHO IS YESOD, was appointed over the tribe of Judah, THAT IS THE SECRET OF MALCHUT. Everything is as it should be, BECAUSE YESOD HAS TO BE JOINED WITH MALCHUT.
480. בֶּן אוּרִי: בֶּן אוֹר קַדְמָאָה, דְּבָרָא קוּדְשָׁא בְּרִיךְ הוּא בְּעוֹבָדָא דִּבְרֵאשִׁית. בֶּן חוּר: בֶּן חִירוּ דְּכֹלָּא. ד"א, בֶּן חוּר: בֶּן חִוָּור מִכָּל גַּוְונִין. וְדָא אִתְמָנֵי לְמַטֵּה יְהוּדָה, כֹּלָּא כַּדְקָא יֵאוֹת.