According to search-discovered classical Islamic scholarship, the concept of prison (السجن, as-Sijn) in the Quran is multifaceted, representing a severe trial, a tool of oppression, and a context for divine justice. The most extensive treatment is in Surah Yusuf, where Prophet Yusuf's unjust imprisonment becomes a crucible for his faith, patience (sabr), and a platform for dawah. Classical commentators like Ibn Kathir emphasize his unwavering reliance on Allah, choosing prison over sin (Quran 12:33). Concurrently, Surah Al-Anfal provides foundational legal principles for the humane treatment of prisoners of war, as noted by jurists like Al-Qurtubi, highlighting mercy and the potential for redemption. Finally, the threat of imprisonment by Pharaoh against Prophet Musa (Moses) in Surah Ash-Shu'ara illustrates its use as a weapon of tyranny against divine truth. This thematic synthesis across the verses reveals that while prison can be an instrument of human injustice, it is ultimately within Allah's control, serving as a test and a means through which His wisdom and justice unfold.