Three Surahs in a Row, Whole

Juz 21 carries an unusually large number of complete surahs for a single division: after finishing Al-Ankabut's last twenty-four verses, it carries three complete surahs in sequence, all sixty verses of Ar-Rum, all thirty-four verses of Luqman and all thirty verses of As-Sajda, before opening Al-Ahzab and stopping less than halfway through its seventy-three verses.

In communities that pace the nightly tarawih prayers of Ramadan at one juz per night, this is customarily the twenty-first 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, a page-level convention distinct from these finer internal marks. 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.