In Bamidbar 10:35-36 there are two upside down Nuns. The traditional explanation is that this serves as a break between different accounts of wicked behavior. Not wanting to list three such counts in a row the torah inserts these bracketed verses:

וַיְהִי בִּנְסֹעַ הָאָרֹן, וַיֹּאמֶר מֹשֶׁה: קוּמָה ה', וְיָפֻצוּ אֹיְבֶיךָ, וְיָנֻסוּ מְשַׂנְאֶיךָ, מִפָּנֶיךָ. וּבְנֻחֹה, יֹאמַר: שׁוּבָה ה', רִבְבוֹת אַלְפֵי יִשְׂרָאֵל.

Why were these pesukim chosen to be the interrupting verses? And why 2?

You must log in to answer this question.