Sahih Bukhari | Volume 3 | Hadith Number 311
Narrated by Ibn 'Abbas
'Ukaz, Majanna and Dhul-Majaz were markets in the Pre-Islamic period. When the people embraced Islam they considered it a sin to trade there. So, the following Holy Verse came: 'There is no harm for you if you seek of the bounty of your Lord (Allah) in the Hajj season." (2:198) Ibn 'Abbas recited it like this.