At-Takāthur (Arabic: التكاثر, "Rivalry, Competition") is the 102nd chapter (sūrah) of the Qur'an, with 8 verses (āyāt).

Regarding the timing and contextual background of the believed revelation (asbāb al-nuzūl), it is an earlier "Meccan surah", which means it is believed to have been revealed in Mecca, rather than later in Medina.

5 Kallā law ta‘lamūna ‘ilma l-yaqīn(i)

8 Thumma latus’alunna yawma’idhin ‘ani n-na‘īm(i)

Three times in a row the sura warns the reader that "you shall know" that those who sow discord are headed towards Hell.

Here, proper understanding is required for entrance into Paradise, and should one not attain this on Earth, one will receive the "eye of certainty" on the Day of Judgment, when "you shall be questioned ... concerning true bliss".