KJV:

12 Because they ministered unto them before their idols, and caused the house of Israel to fall into iniquity; therefore have I lifted up mine hand against them, saith the Lord GOD, and they shall bear their iniquity.
13 And they shall not come near unto me, to do the office of a priest unto me, nor to come near to any of my holy things, in the most holy place: but they shall bear their shame, and their abominations which they have committed.
14 But I will make them keepers of the charge of the house, for all the service thereof, and for all that shall be done therein.
15 But the priests the Levites, the sons of Zadok, that kept the charge of my sanctuary when the children of Israel went astray from me, they shall come near to me to minister unto me, and they shall stand before me to offer unto me the fat and the blood, saith the Lord GOD:
16 They shall enter into my sanctuary, and they shall come near to my table, to minister unto me, and they shall keep my charge.

NASB:

12 "Because they ministered to them before their idols and became a stumbling block of iniquity to the house of Israel, therefore I have sworn against them," declares the Lord GOD, "that they shall bear the punishment for their iniquity.
13 "And they shall not come near to Me to serve as a priest to Me, nor come near to any of My holy things, to the things that are most holy; but they will bear their shame and their abominations which they have committed.
14 "Yet I will appoint them to keep charge of the house, of all its service and of all that shall be done in it.
15 "But the Levitical priests, the sons of Zadok, who kept charge of My sanctuary when the sons of Israel went astray from Me, shall come near to Me to minister to Me; and they shall stand before Me to offer Me the fat and the blood," declares the Lord GOD.
16 "They shall enter My sanctuary; they shall come near to My table to minister to Me and keep My charge.

‫יב  יַעַן, אֲשֶׁר יְשָׁרְתוּ אוֹתָם לִפְנֵי גִלּוּלֵיהֶם, וְהָיוּ לְבֵית-יִשְׂרָאֵל, לְמִכְשׁוֹל עָו‍ֹן; עַל-כֵּן נָשָׂאתִי יָדִי עֲלֵיהֶם, נְאֻם אֲדֹנָי יְהוִה, וְנָשְׂאוּ, עֲו‍ֹנָם.

‫יג  וְלֹא-יִגְּשׁוּ אֵלַי, לְכַהֵן לִי, וְלָגֶשֶׁת עַל-כָּל-קָדָשַׁי, אֶל-קָדְשֵׁי הַקֳּדָשִׁים; וְנָשְׂאוּ, כְּלִמָּתָם, וְתוֹעֲבוֹתָם, אֲשֶׁר עָשׂוּ.

‫יד  וְנָתַתִּי אוֹתָם, שֹׁמְרֵי מִשְׁמֶרֶת הַבָּיִת--לְכֹל, עֲבֹדָתוֹ, וּלְכֹל אֲשֶׁר יֵעָשֶׂה, בּוֹ. {פ}

‫טו  וְהַכֹּהֲנִים הַלְוִיִּם בְּנֵי צָדוֹק, אֲשֶׁר שָׁמְרוּ אֶת-מִשְׁמֶרֶת מִקְדָּשִׁי בִּתְעוֹת בְּנֵי-יִשְׂרָאֵל מֵעָלַי--הֵמָּה יִקְרְבוּ אֵלַי, לְשָׁרְתֵנִי; וְעָמְדוּ לְפָנַי, לְהַקְרִיב לִי חֵלֶב וָדָם--נְאֻם, אֲדֹנָי יְהוִה.

‫טז  הֵמָּה יָבֹאוּ אֶל-מִקְדָּשִׁי, וְהֵמָּה יִקְרְבוּ אֶל-שֻׁלְחָנִי--לְשָׁרְתֵנִי; וְשָׁמְרוּ, אֶת-מִשְׁמַרְתִּי.