Page "Attar of Nishapur" Paragraph 21

According to Edward G. Browne, Attar as well as Rumi and Sana ' i were all Sunni Muslims and their poetry abound with praise for the first two caliphs Abu Bakr and Umar ibn al-Khattāb.

According to Annemarie Schimmel, the tendency among Shia authors to include leading mystical poets such as Rumi and Attar among their own ranks, became stronger after the introduction of Twelver Shia as the state religion in the Safavid Empire in 1501.