https://thornhillkollel.com/wp-content/uploads/2017/07/Megilla-perek-aleph-mishna-4-if-the-megilla-was-read-during-the-first-Asar-and-a-second-one-was-added-.mp3“Megilla perek aleph mishna 4 if the megilla was read during the first Asar and a second one was added”.