Yosef Karo, Translation:Shulchan Aruch — Orach Chaim 692…
“ Shulchan Aruch Orach Chaim 692 The laws concerning the blessings over the reading of the Megilah דיני ברכת המגילה 692:1 One reading the megillah blesses three blessings beforehand: "on the reading of the megillah," "who did miracles," and "who has sustained us." During the day, one does not say "who has sustained us" again. Rem"a: Some say that even during the day, we say "who has sustained us" (Tur in the name of Rabbeinu Tam, Ros"h, Maggid) (and this is the practice in all of these countries. One person can bless and another person read) (Hagahot Ashiri ch. 2) . ”
