Abu Ishaq al-Biri, the poet of the Andalusian Ascetic Church, and Nasser Khosrow, the great Iranian poet and sage, are among the poets of the fifth century AH who have similar similarities in terms of thought and message hidden in their poetry. Both have common views on the world, death, and other issues related to asceticism. In their view, the world is a deceptive abode and bride that is not a place of refuge and is a passageway to the abode of the Hereafter. According to Al-Biri and Nasser Khosrow, science is much higher than the wealth and essence of existence and human existence. This research, in an analytical-descriptive and content-based manner, seeks to explain and derive common sparks from the poetic themes of the two poets throughout the American school of comparative literature. The findings of this study indicate that Al-Biri and Nasser Khosrow, in the field of ascetic concepts, such as similar view of the world, death, etc., had a common view and have the same intellectual origin. Keywords: Arabic and Persian Poetry, Comparative Literature, Abu Ishaq Al-Biri, Nasser Khosrow, Common Topics. The findings of this study indicate that Al-Biri and Nasser Khosrow, in the field of ascetic concepts, such as similar view of the world, death, etc., had a common view and have the same intellectual origin.