יב אִם מֵנִיחַ תְּפִלִּין כַּמָּה פְּעָמִים בָּיוֹם, צָרִיךְ לְבָרֵךְ עֲלֵיהֶם בְּכָל פַּעַם. נִשְׁמְטוּ מִמְּקוֹמָם וּמְמַשְׁמֵשׁ בָּהֶם לְהַחֲזִירָן לִמְקוֹמָן צָרִיךְ לְבָרֵךְ: הַגָּה: וְאִם מַחֲזִיר אַחַת מֵהֶם מְבָרֵךְ כְּמִי שֶׁמֵּנִיחַ תְּפִלָּה אַחַת כְּדִלְקַמָּן סי' כ"ו (דִּבְרֵי עַצְמוֹ) הֵזִיזָם מִמְּקוֹמָם אַדַּעְתָּא לְהַחֲזִירָם מִיָּד, צָרִיךְ לְבָרֵךְ: הַגָּה: וְיֵשׁ אוֹמְרִים שֶׁלֹּא לְבָרֵךְ (טוּר סי' ח') וְהָכִי נָהוּג וּכְבָר נִתְבָּאֵר לְעֵיל סי' ח' (סָעִיף י"ד) מִי שֶׁמֵּנִיחַ תְּפִלִּין שֶׁל יָד וּבֵרַךְ, וּבִתְחִלַּת הַהִדּוּק נִפְסַק הַקֶּשֶׁר שֶׁל יָד, וְהֻצְרַךְ לַעֲשׂוֹת קֶשֶׁר אַחֵר, אָמְנָם לֹא הֵסִיחַ דַּעְתּוֹ, אֵינוֹ צָרִיךְ לַחֲזֹר וּלְבָרֵךְ. אִם הֻתַּר שֶׁל יָד קֹדֶם הֲנָחַת שֶׁל רֹאשׁ, מְהַדְּקָן, וְאֵין צָרִיךְ לַחֲזֹר וּלְבָרֵךְ. אֲבָל אִם הֵנִיחַ שֶׁל רֹאשׁ, וְאַחַר כָּךְ הֻתַּר שֶׁל יָד, מְהַדֵּק וּמְבָרֵךְ. מֻתָּר לְבָרֵךְ עַל תְּפִלִּין שְׁאוּלִין, וְלֹא עַל גְּזוּלִין.
12 If one puts on tefillin multiple times in one day, he must recite the blessing on them each time. If they moved from their place [on his head or arm] and he adjusted them to return them to their proper place, he must recite the blessing. Rema: If he returned [only] one of them [back to their proper place], he recites the blessing like one who one only puts on one tefilla - as seen below in siman 26 [this is the Rem"a's own opinion]. If one moved them from their place with the intent to replace them immediately, he still must recite the blessing. Rema: There are those who say you should not recite a blessing [Tur - siman 8], and that is the prevalent custom. This was already explained above in siman 8, se'if 14 [If] one was putting on the arm tefillin and recited the blessing, and as he was tightening it, the knot severed and he has to form a new knot, however, he did not take his mind off [of the tefillin] - he does not have to recite the blessing again. If the arm tefillin became loosened before putting on the head tefillin, he should tighten it, and he does not need to recite the blessing again. But if he put on the head tefillin and then the arm tefilling became loosened, then he should tighten it and recite the blessing [again]. It is permitted to recite the blessing on borrowed tefillin, but not on stolen ones.