A Long Surah and a Short One, Both Whole

Juz 23 finishes Ya-Sin's last fifty-six verses, then carries two complete surahs, all one hundred and eighty-two verses of As-Saffat despite its considerable length, and all eighty-eight verses of Sad, before opening Az-Zumar and carrying just over two-fifths of its seventy-five verses. As-Saffat is among the longer surahs to be carried whole within a single juz anywhere in the Quran.

In communities that pace the nightly tarawih prayers of Ramadan at one juz per night, this is customarily the twenty-third night's portion, though many mosques recite faster to finish early in the month or slower to spread the reading further, and some congregations instead divide the whole Quran among thirty reciters for a single collective khatm. Huffaz reviewing memorised portions often pace themselves by a juz's two hizb and four quarter-hizb divisions rather than by surah, and printed Mushafs typically mark each juz's opening in the margin with a small medallion inscribed with its number. Many print editions, including the widely used 604-page Uthmani Mushaf standardised by Saudi Arabia's King Fahd Complex, begin each juz on a fresh page and hold each to roughly twenty pages, letting a reciter track a night's target by page count alone without consulting verse numbers.