Halakhah zu Schemuel I 20:78

Beginning with the Shabbos following Tishah beAv and after that, for the next seven Shabbosos we read the haftoras "sheva denechamasa" [seven haftoras of consolation]. If the first day of Rosh Chodesh Elul occurs on Shabbos, the haftorah, Aniyah so'arah, is set aside ["O you afflicted, floundering in the storm,"] (Isaiah 54:11) and we read instead, "Hashamayim kis'i," [The heaven is My throne] (Isaiah 66:1), because this haftorah also contains consolation for Jerusalem. On the Shabbos of Parshas Ki Seitzei, when the haftorah Roni akarah [Sing, O barren woman] (Isaiah 54:1) is read, we conclude the haftorah with Aniyah so'arah, which is next to it. If, by mistake, on Shabbos Rosh Chodesh Elul, you said Aniyah so'arah, and you became aware of it before saying the concluding berachos, you should also say Hashamayim kis'i, and then say the concluding berachah. If you only became aware [of your error] after saying the concluding berachos, then you should recite, Hashamayim kis'i without the berachos. If Rosh Chodesh Elul occurs on Sunday, the haftorah, Machar Chodesh is set aside, [Tomorrow is Rosh Chodesh] (I Samuel 20:18), because it contains no consolation for Jerusalem, and the haftorah Aniyah so'arah is read.

Rosh Ḥodesh that falls on the first day of the week, as a final prophetic reading on the Shabbat before it we read I Samuel 20:18-42, "And Jonathan said to him, tomorrow is the new moon" (but we do not override "Unhappy, storm-tossed" or "Hear ye" for the day before Rosh Ḥodesh). And if Rosh Ḥodesh is two days, Shabbat and Sunday, as a final prophetic reading we read Isaiah 66, "The heavens are My throne," and some have the practice of afterwards reading the first (I Samuel 20:18) and last (I Samuel 20:42) verses of "And Jonathan said to him," to remind that the next day is also Rosh Ḥodesh. (Rema: And some say that we do not skip from prophet to prophet, and say nothing but the final prophetic reading for Rosh Ḥodesh. And thus is the custom, but if the final prophetic reading is in the same prophet, we do this and that. If there is a wedding on a Rosh Ḥodesh or on other Sabbaths, we do not override the final prophetic reading.)

Rosh Ḥodesh that falls on the first day of the week, as a final prophetic reading on the Shabbat before it we read I Samuel 20:18-42, "And Jonathan said to him, tomorrow is the new moon" (but we do not override "Unhappy, storm-tossed" or "Hear ye" for the day before Rosh Ḥodesh). And if Rosh Ḥodesh is two days, Shabbat and Sunday, as a final prophetic reading we read Isaiah 66, "The heavens are My throne," and some have the practice of afterwards reading the first (I Samuel 20:18) and last (I Samuel 20:42) verses of "And Jonathan said to him," to remind that the next day is also Rosh Ḥodesh. (Rema: And some say that we do not skip from prophet to prophet, and say nothing but the final prophetic reading for Rosh Ḥodesh. And thus is the custom, but if the final prophetic reading is in the same prophet, we do this and that. If there is a wedding on a Rosh Ḥodesh or on other Sabbaths, we do not override the final prophetic reading.)

Rosh Ḥodesh that falls on the first day of the week, as a final prophetic reading on the Shabbat before it we read I Samuel 20:18-42, "And Jonathan said to him, tomorrow is the new moon" (but we do not override "Unhappy, storm-tossed" or "Hear ye" for the day before Rosh Ḥodesh). And if Rosh Ḥodesh is two days, Shabbat and Sunday, as a final prophetic reading we read Isaiah 66, "The heavens are My throne," and some have the practice of afterwards reading the first (I Samuel 20:18) and last (I Samuel 20:42) verses of "And Jonathan said to him," to remind that the next day is also Rosh Ḥodesh. (Rema: And some say that we do not skip from prophet to prophet, and say nothing but the final prophetic reading for Rosh Ḥodesh. And thus is the custom, but if the final prophetic reading is in the same prophet, we do this and that. If there is a wedding on a Rosh Ḥodesh or on other Sabbaths, we do not override the final prophetic reading.)