The Quran in general is divided into chapters (surah) and verses (ayat). It is additionally divided into 30 equal sections, called juz . Of note, division into Juzʾ has no relevance to the meaning of the Quran and anyone can start reading from anywhere in the Quran. The divisions of juz do not fall evenly along chapter lines. These divisions make it easier to pace the reading over a month’s period, reading a fairly equal amount each day. This is particularly important during the month of Ramadan, when it is recommended to complete at least one full reading of the Quran from cover to cover. Some use this divisions to facilitate recitation of the Quran in a month, especially during Ramadan when the entire Quran is recited in the Tarawih prayers, reciting approximately one juzʾ a night.
The nineteenth juz’ of the Quran starts from verse 21 of the 25th chapter (25.Al-Furqan :21) and continues to verse 55 of the 27th chapter (27.An-Naml :55).
“Did you not see the one who had deified his ‘hawa’ (instinctual desires, bodily form, illusionary self)..!” (Quran 25:43)
“So magnificent is He Who forms constellations in the skies (the materialization of the various compositional groups of His Names at the macro level)...” (Quran 25:61)
“...And whoever is grateful, his gratitude is for his self (the realization and evaluation of the perfection of his essence)...” (Quran 27:40)