The Shulchan Aruch, in Siman (section) Kuf Lamed Zayin (137), Se'if (subsection) Gimel (three), discusses a case that could happen when the Baal Koreh (Torah reader), for example, forgets to read one Pasuk (verse) or skips one. It could happen at the beginning of an Aliyah (Torah-reading honor). Let's say Revi'i (fourth) finished, and Chamishi (fifth) starts one Pasuk below, two Pesukim below, or ten Pesukim below. Sometimes you can make a mistake; it happens. Or, if they make a mistake in their reading, it's as if they didn't read that word or that Pasuk. So what do you do?
The Shulchan Aruch talks about Shabbat; it's the same thing for Chol (weekday), but on Shabbat we're going to see there's more Chidush (novel insight). On Shabbat, even if he forgets one Pasuk, he repeats and repeats. He has to go back and read that Pasuk, even after he repeats the Torah. Even after they bring the Torah back, when it is already inside and they have said Kaddish (sanctification prayer) and concluded, they read again with two Pesukim. You never have an Aliyah with fewer than three Pesukim, so you reread that Pasuk or whatever. If it was three Pesukim they skipped, then of course you don't have to add to that. It means the minimum is three Pesukim. Even if they did Maftir (concluding Torah-reading aliyah), and then they prayed Musaf (additional prayer), and then somebody says, “Did you read this?” he has to read again.
This happened—not here, but almost—because in the Parasha of Shekalim, there are two ledoroteichem (for your generations), and it skips the last two Pesukim of the Parasha of Shekalim. If you look it up there, it's missing one or two Pesukim, and people don't know. I picked it up and said, “No, no, you have to keep reading.” It doesn't show in the book. I remember thinking, “What do you mean?” But you keep reading. It's missing one or two Pesukim. And therefore, this could be a case.
What do you do after that? Well, you have to take the Sefer Torah (Torah scroll) out and read again, but you have to read three Pesukim together. You cannot read one. Some Poskim (halachic authorities) learn from the Shulchan Aruch that you do not have to say a Beracha (blessing) when you do that. Why? Because you concluded already, you had the Seven Olim (those called to the Torah), you had everything; you don't have to say a Beracha. The problem was that two Se'ifim later, the Shulchan Aruch talks about a different case. He actually talks about a similar case to the one I just mentioned. In Parashat Parah, he says: If he stops in the middle and opens the Sefer Torah, he starts from the beginning of the Parasha until the end, and he blesses before it and after it. In the other context, in the Halacha (Jewish law) of Parah, the Shulchan Aruch says you have to say a Beracha before and after. Most Poskim say there's no distinction, there's no difference between the two cases, and every time you take the Sefer Torah out, you have to say a Beracha before and after. There's no question about that. The grand majority of Poskim pasken (issue halachic rulings) Halacha this way whenever you take the Sefer Torah out, regardless of whether it's Parashat Parah or something else.
The Mishnah Berurah is mechadesh (offers a novel insight) a very big Chidush, and Hacham Ovadia agrees with this Chidush. The Chidush is that it depends on which Aliyah it happened in. If it happened, says the Mishnah Berurah, on the first six Aliyot, then you do have to take the Sefer Torah and say a Beracha before and after. But if it happened during the seventh Aliyah, after he read three Pesukim, really, Min HaDin (according to the law), at this point you had seven Olim on Shabbat. Each one said the Beracha before; each one had a Beracha, well done, on three Pesukim. What's the big deal? It's already the way we cut the Parashiyot; that's the way we cut it. But that's not Halacha le-Moshe MiSinai (a law given to Moses at Sinai). We know of Poskim who said that the Parashiyot were cut differently. Historically, in some communities they were cut very differently, even the Parashiyot. So what's the problem? You had seven Olim, each one had three Pesukim. What's the problem? Why should you add another Beracha for reading a Pasuk? And therefore, it was a Halacha: If the mistake happened after the seventh, or during the seventh Aliyah, after three Pesukim, in that case you take out the Sefer Torah and read three Pesukim, but you do it without a Beracha.