The Surah is so designated after the word al-bayyinah occurring at the end of the first verse.
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Where it was revealed, at Makkah or Madinah, is also disputed. Some commentators say it is a Makki revelation according to most scholars; others say it is a Madani revelation according to most scholars. Ibn Az Zubair and Ata bin Yasar hold the view that it is Madani. Ibn Abbas and Qatadah are reported to have held two views, first that it is Makki, second that it is Madani. Hadrat Aishah regards it as a Makki Surah. Abu Hayyan, author of Bahr al-Muhit, and Abdul Munim ibn al- Faras, author of Ahkam al-Quran, also have preferred to regard it as Makki. As for its contents, there is nothing in it to indicate whether it was revealed at Makkah or at Madinah.