According to search-discovered classical Islamic scholarship, the verses of Surah Al-Ma'un (107:4-6) issue a severe warning against performing acts of worship 'for the wrong reasons.' Ibn Kathir, in his renowned tafsir, explains that the 'woe' is for those whose prayer is corrupted by heedlessness (sahun) or ostentation (riya). 'Heedlessness' refers to neglecting prayer by delaying it, performing it improperly, or abandoning it in private. Al-Qurtubi further elaborates that the subsequent verse, 'those who make a show,' pinpoints the core disease: performing deeds to be seen and praised by people, a practice known as Riya. This act is considered a form of hidden polytheism (shirk) because it diverts the intention of worship away from Allah towards creation. The synthesis of these verses, supported by scholars like At-Tabari, establishes a foundational principle in Islam: the absolute necessity of Ikhlas (sincerity) for the acceptance of any deed. Worship done for worldly recognition is spiritually bankrupt and subject to divine condemnation.