Surah Qaf addresses the theme of the hereafter, emphasizing that resurrection after death is possible despite disbelief. It was revealed during a period of intensified opposition to the Prophet Muhammad's message in Makkah, around the fifth year of his prophethood. The surah highlights God's omniscience and assures that every action is recorded, warning disbelievers of the consequences of their denial while offering hope to the righteous for eternal life in paradise.