Maaseh Rav Siman 23
Can copy this into an AI, or connect the whole library to your assistant. For deeper learning, you can directly use the original seforim, sites, and apps.
צריך לברך בכל פעם שמניח אפי' כמה פעמים ביום:
Sefaria Community Translation
One needs to bless each time he puts on (tefillin) even many times in a day.