Juz 13

A juz (plural ajza), also called a para in South Asia, is one of thirty roughly equal divisions of the written Quran. The division is made by length rather than by meaning, so a juz usually begins and ends in the middle of a surah; each is further split into two hizb and each hizb into quarters. Reciting one juz a night completes the whole Quran across a lunar month, a rhythm tied above all to Ramadan, when the entire text is recited in the nightly tarawih prayers. This portion spans Yusuf 12:53 through Ibrahim 14:52. The story of Joseph reaches its reunion and reconciliation, described in the surah as 'the most beautiful of narratives.' It is followed by Ar-Rad ('The Thunder') on the signs of creation and Ibrahim ('Abraham'), which preserves Abraham's prayer for Mecca and its people.

Ar-Rad's meditation on the signs of creation, thunder among them, gives the surah its name, and its description of thunder 'glorifying God's praise' (13:13) became a devotional commonplace cited whenever later Islamic literature treats natural phenomena as forms of worship distinct from human speech. Ibrahim, which follows, preserves Abraham's prayer for the safety and provision of Mecca and its people (14:35-41), a passage tradition connects directly to the sanctuary's continuing sanctity and to the pilgrimage rites later chapters of the Quran set out in fuller detail.

Juz 13 finishes Yusuf's last fifty-nine verses, then carries two complete surahs back to back, all forty-three verses of Ar-Rad and all fifty-two verses of Ibrahim, ending precisely on Ibrahim's final verse. It is one of the few juz boundaries in the Quran that lands exactly on a surah's own ending rather than splitting one mid-argument.

In communities that pace the nightly tarawih prayers of Ramadan at one juz per night, this is customarily the thirteenth 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, since these evenly sized units make a consistent daily review schedule possible regardless of where a surah boundary falls. 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 the finer hizb and quarter-hizb marks placed within the text itself to guide reciters mid-portion. Some Mushaf editions additionally shade or border the margin differently for each hizb, so a reciter can judge progress through the juz at a glance without counting verses.