Al-Qasas (Arabic: القصص, ’al-qaṣaṣ; meaning: The Story) is the 28th chapter (sūrah) of the Qur'an with 88 verses (āyāt).
According to Ibn Kathir's commentary, the chapter takes its name from verse 25 in which the word Al-Qasas occurs. Lexically, qasas means to relate events in their proper sequence. Thus, from the viewpoint of the meaning too, this word can be a suitable title for this Surah, for in it the detailed story of the Prophet Moses has been related, also it includes story of Qarun from verse 76 to verse 83, explaining how Qarun was proud of himself thinking that his huge wealth earned by his own science, denying the grace of God on him, and later God destroyed him with his wealth underground.
Regarding the timing and contextual background of the revelation (asbāb al-nuzūl), it is traditionally believed to be a Meccan surah, from the second Meccan period (615-619).
86-88 Muhammad exhorted to steadfastness in the faith of Islam [1]
References
^Wherry, Elwood Morris (1896). A Complete Index to Sale's Text, Preliminary Discourse, and Notes. London: Kegan Paul, Trench, Trubner, and Co. This article incorporates text from this source, which is in the public domain.
Further reading
'Athamina, Khalil (1992). "Al-Qasas: Its Emergence, Religious Origin and Its Socio-Political Impact on Early Muslim Society". Studia Islamica (76): 53–74. doi:10.2307/1595660. ISSN0585-5292. JSTOR1595660.