Related על מגילה 58:14

[When] Rosh Chodesh Adar falls on Shabbat, we read the portion of "Shekalim" (Ex. 30:11-16) and in addition we read the portion of the shekalim that concerns Yehoyada the Kohen (commencing with 2 Kings 12:8). What is the "first Shabbat"? Any Rosh Chodesh Adar falls within [that designation], even on Erev Shabbat. On the second Shabbat, [we read the portion beginning] "Remember [what Amalek did]" (Deut. 25:17) and additionally we read "Thus said the Lord of Hosts, I remember what Amelek did to Israel" (1 Sam. 15:2). What is the "second Shabbat"? Every [Shabbat] in which Purim falls within it, and even on Erev Shabbat. On the third [Sabbath we read the portion of] the Red Heifer, and additionally we read "And I will sprinkle pure water on you and you will be purified" (Ezek. 36:25). What is the "third Shabbat"? Any [Shabbat] that immediately follows Purim. The fourth [Shabbat we read], "This month shall be to you the head of the months" (Ex. 12:2), and in addition [we read] "Thus said the Lord, in the first [month], on the first of the month" (Ezek. 45:18). Which is the fourth Shabbat? Any [Shabbat] in which Rosh Chodesh Nissan falls within it, and even on Erev Shabbat.

[When] Rosh Chodesh Adar falls on Shabbat, we read the portion of "Shekalim" (Ex. 30:11-16) and in addition we read the portion of the shekalim that concerns Yehoyada the Kohen (commencing with 2 Kings 12:8). What is the "first Shabbat"? Any Rosh Chodesh Adar falls within [that designation], even on Erev Shabbat. On the second Shabbat, [we read the portion beginning] "Remember [what Amalek did]" (Deut. 25:17) and additionally we read "Thus said the Lord of Hosts, I remember what Amelek did to Israel" (1 Sam. 15:2). What is the "second Shabbat"? Every [Shabbat] in which Purim falls within it, and even on Erev Shabbat. On the third [Sabbath we read the portion of] the Red Heifer, and additionally we read "And I will sprinkle pure water on you and you will be purified" (Ezek. 36:25). What is the "third Shabbat"? Any [Shabbat] that immediately follows Purim. The fourth [Shabbat we read], "This month shall be to you the head of the months" (Ex. 12:2), and in addition [we read] "Thus said the Lord, in the first [month], on the first of the month" (Ezek. 45:18). Which is the fourth Shabbat? Any [Shabbat] in which Rosh Chodesh Nissan falls within it, and even on Erev Shabbat.

[If] the portion of the Shekalim fell [as part of the normal cycle] next to Adar, either before it or after it, we read it [at its normal time] and then we read it a second time [for purposes of Purim], and so two for the second [portion], and so too for the third, and so too for the fourth. And so too for Chanukah (בחנוכה not בפורים). They ask about the halachot of Passover on Passover, and the halachot of Shevuot on Shevuot, and the halachot of Sukkot on Sukkot. In the study hall they ask about the halachot of Passover thirty days before Passover. Rabban Shimon ben Gamaliel says, two weeks.

On a Rosh Chodesh that falls on Chanukah, we read (Num. 28:11), "And on the first of your months [etc.]." At the place that they leave off [the Torah reading] in the morning service on Shabbat, they begin from that point in the afternoon service. [Where they leave off] in the afternoon service, they begin from that point on Monday, [and from where they leave off] on Monday, they begin from point on Thursday, [and from where they leave off] on Thursday, they begin from that point on the next Shabbat. Rabbi Yehuda says, at the place where they leave off [the Torah reading] in the morning service on Shabbat, they begin from there on the next Shabbat.