According to search-discovered classical Islamic scholarship, the Night (Al-Layl) is a foundational concept in the Quran with a profound dual significance. Tafsir Ibn Kathir, synthesizing numerous verses like 3:190, explains the alternation of night and day as a primary sign (ayah) of Allah's absolute power and wisdom, intended for 'those of understanding' to reflect upon the Creator. Simultaneously, as seen in Surah Al-Muzzammil, the night is established as the most potent time for intimate worship and spiritual ascent, with Al-Qurtubi detailing the virtues and rulings of the voluntary night prayer (Tahajjud). The Quran designates the night as a mercy for mankind, providing tranquility and rest (sakan) as stated in 78:10. This physical rest prepares the believer for the spiritual depth offered in the night's stillness, which is why it was chosen for pivotal divine events like the Prophet's Night Journey (Al-Isra') and the first revelation on Laylat al-Qadr. This synthesis across 88+ verses establishes the Night not merely as a period of darkness, but as a sacred space for both universal rest and unparalleled spiritual opportunity.