(1) بَابُ مَا جَاءَ فِي قَوْلِ اللَّهِ تَعَالَى: {فَإِذَا قُضِيَتِ الصَّلاَةُ فَانْتَشِرُوا فِي الأَرْضِ وَابْتَغُوا مِنْ فَضْلِ اللَّهِ وَاذْكُرُوا اللَّهَ كَثِيرًا لَعَلَّكُمْ تُفْلِحُونَ وَإِذَا رَأَوْا تِجَارَةً أَوْ لَهْوًا انْفَضُّوا إِلَيْهَا وَتَرَكُوكَ قَائِمًا قُلْ مَا عِنْدَ اللَّهِ خَيْرٌ مِنَ اللَّهْوِ وَمِنَ التِّجَارَةِ وَاللَّهُ خَيْرُ الرَّازِقِينَ}
Narrated Ibn `Abbas:
`Ukaz, Majanna and Dhul-Majaz were marketplaces in the Pre-Islamic period of ignorance. When Islam came, Muslims felt that marketing there might be a sin. So, the Divine Inspiration came: "There is no harm for you to seek the bounty of your Lord (in the seasons of Hajj)." (2.198) Ibn `Abbas recited the Verse in this way.
Reference: Sahih al-Bukhari 2050
In-book reference: Book 34, Hadith 4
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 34, Hadith 266