As late as the mid-12th century, some Pashtuns appears to have not yet converted to Islam.
According to the “Ajaib al-Makhluqat” of Muhammad al-Tusi (written in 1160-1167 AD), there was a large tree with circumference of seventeen arsh (?) in a Tamarisk forest of the Pashtun country. That particular tree was known as ‘the tree of Brahman’ (درخت برهمن) and Pashtuns would prostrate before it.
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Following is the original Persian text of the passage from “Ajaib al-Makhluqat” :-
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