https://www.sefaria.org/Tze'enah_Ure'enah%2C_Haftarot%2C_Second_Day_of_Rosh_Hashanah
Tze'enah Ure'enah, Haftarot, Second Day of Rosh Hashanah | Sefaria Library
second dayrosh hashanahenahurehaftarot
https://www.sefaria.org/Abudarham%2C_Hebrew_Calendar%2C_Order_of_Parashiot_and_Haftarot.59?lang=bi&with=all&lang2=en
Abudarham, Hebrew Calendar, Order of Parashiot and Haftarot 59 | Sefaria Library
And the Midrash punningly says that they established to say at the beginning of the prophetic readings of consolation "Comfort, comfort my people" (Isaiah...
hebrew calendarorder ofabudarham