Hizb 16 opens Juz 8 with an entirely new sura and an entirely new register from the ethical summary that closed Juz 7, moving from a compact list of obligations into an extended narrative cycle that will continue across several more hizb divisions before it finishes. In tarawih recitation this hizb typically opens the eighth night, and its four rub al-hizb quarters roughly track the narrative's own progression from Adam's story through Noah, Hud and Salih toward Shuaib.
Because the prophetic accounts here repeat a consistent structure, warning, rejection, destruction, huffaz reviewing this hizb by quarter often describe it as easier to memorise in bulk than material without that repeating shape, even though the proper names, Ad, Thamud, Midian, still require careful attention to keep the accounts distinct from one another.
The hizb and quarter marks give no special notice to where one prophet's story ends and the next begins, since those transitions fall well inside the ordinary rub al-hizb divisions rather than at their edges, a further example of how the sixty-part scheme paces recitation by length rather than by narrative unit.
Reciters new to tarawih sometimes find the sequence of prophets easier to follow on a second or third night's hearing than on the first, once the repeating pattern of warning, rejection and destruction has become familiar across the cycle.