Hizb 25 opens Juz 13, and it is the hizb in which Yusuf's long narrative, carried since Hizb 24, finally reaches its resolution before Ar-Rad opens a noticeably different kind of material in the hizb's second half. Reciters and listeners following the story across two consecutive hizb divisions typically experience this one as the emotional close of an arc rather than as the start of something new, even though structurally it is this hizb, not the previous one, that actually contains the reunion itself.
In tarawih recitation this hizb typically opens the thirteenth night, and congregations following Yusuf night by night often regard its resolution here as one of the more satisfying single moments in the whole cycle, a rare case where a hizb boundary happens to fall very close to genuine narrative closure rather than in the middle of an ongoing account.
Huffaz reviewing this hizb by quarter usually treat the shift from Yusuf's resolution into Ar-Rad's argument from nature as a clear marker of where the fourth quarter begins, since almost nothing else in the thirty-juz scheme changes register this sharply within a single quarter's length.
That shift is sharp enough that some reciters mark it with a brief pause even though nothing in the hizb or rub al-hizb divisions themselves calls for one, treating the change of register as worth a moment's notice for a listening congregation.