Realm of Neither Thought Nor No Thought

  Realm of Neither Thought Nor No Thought
非想非非想処 (Skt Naivasamjnanasamjnayatana; Jpn Hiso-hihiso-sho)

    Also, Naivasam-jnanasamjna Realm, Heaven of Neither Thought Nor No Thought, or Heaven Where There Is Neither Thought Nor No Thought. This realm, known as the Summit of Being Heaven, is the highest heaven in the world of formlessness. Meditation leading to rebirth in this realm is called meditation on the Realm of Neither Thought Nor No Thought. The life span of beings in the Realm of Neither Thought Nor No Thought is said to be eighty thousand kalpas.

See also world of formlessness.

Source

www.sgilibrary.org