All of the brothers

(כ"ז:ט-י)

וְאִם אֵין לוֹ בַּת וּנְתַתֶּם אֶת נַחֲלָתוֹ לְאֶחָיו

וְאִם אֵין לוֹ אַחִים וּנְתַתֶּם אֶת נַחֲלָתוֹ לַאֲחֵי אָבִיו

In the first פסוק one must be careful about לְאֶחָיו, to his brothers, not being pronounced לְאָחִיו, to his (singular) brother. However, the second פסוק contains a more dangerous possible mistake (by that, I mean that it is a mistake much easier to make and much harder to detect) and that would be לַאֲחִי אָבִיו instead of לַאֲחֵי אָבִיו, once again erroneously switching the plural to the singular.