KJV:

13 Then said he unto me, The north chambers and the south chambers, which are before the separate place, they be holy chambers, where the priests that approach unto the LORD shall eat the most holy things: there shall they lay the most holy things, and the meat offering, and the sin offering, and the trespass offering; for the place is holy.
14 When the priests enter therein, then shall they not go out of the holy place into the utter court, but there they shall lay their garments wherein they minister; for they are holy; and shall put on other garments, and shall approach to those things which are for the people.

NASB:

13 Then he said to me, "The north chambers and the south chambers, which are opposite the separate area, they are the holy chambers where the priests who are near to the LORD shall eat the most holy things. There they shall lay the most holy things, the grain offering, the sin offering and the guilt offering; for the place is holy.
14 "When the priests enter, then they shall not go out into the outer court from the sanctuary without laying there their garments in which they minister, for they are holy. They shall put on other garments; then they shall approach that which is for the people."

‫יג  וַיֹּאמֶר אֵלַי, לִשְׁכוֹת הַצָּפוֹן לִשְׁכוֹת הַדָּרוֹם אֲשֶׁר אֶל-פְּנֵי הַגִּזְרָה, הֵנָּה לִשְׁכוֹת הַקֹּדֶשׁ אֲשֶׁר יֹאכְלוּ-שָׁם הַכֹּהֲנִים אֲשֶׁר-קְרוֹבִים לַיהוָה, קָדְשֵׁי הַקֳּדָשִׁים: שָׁם יַנִּיחוּ קָדְשֵׁי הַקֳּדָשִׁים, וְהַמִּנְחָה וְהַחַטָּאת וְהָאָשָׁם--כִּי הַמָּקוֹם, קָדֹשׁ.

‫יד  בְּבֹאָם הַכֹּהֲנִים, וְלֹא-יֵצְאוּ מֵהַקֹּדֶשׁ אֶל-הֶחָצֵר הַחִיצוֹנָה, וְשָׁם יַנִּיחוּ בִגְדֵיהֶם אֲשֶׁר-יְשָׁרְתוּ בָהֶן, כִּי-קֹדֶשׁ הֵנָּה; ילבשו (וְלָבְשׁוּ) בְּגָדִים אֲחֵרִים, וְקָרְבוּ אֶל-אֲשֶׁר לָעָם.

The first and second floor of buildings located opposite the Temple and the square with the altar are occupied by changing rooms for the Kohanim. Each booth has two washbasins, from the “clean” and “dirty” sides, and also there is a mikveh that cannot be avoided without having been there. On the third floor of the buildings opposite the Temple, there are refectory halls for the Kohanim.