One of the examples of Kowsar, is the plurality and dispersion of the generations and the offspring of Hazrat Zahra (peace be upon her), that this pure Kowsar has spread all over the world even after centuries. Interestingly, the Sunnis commentators and exegetes like Fakhr Razi also reiterates on this issue.
Tafseer e Kabeer:124/32
source : erfan.ir