Ibn 'Abbas (May Allah be pleased with them) reported:
Ukaz, Mijannah and Dhul-Majaz were markets during the pre-Islamic period. The Companions disliked trading there till the following Ayat of the Noble Qur'an were revealed: "There is no sin on you if you seek the Bounty of your Rubb (during pilgrimage by trading)..." (2:198)[Al- Bukhari].
App reference: Book 11, Hadith 14
Arabic/English book reference: Book 11, Hadith 1284