Arabic:

لَا إِلَٰهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ، يُحْيِي وَيُمِيتُ، وَهُوَ حَيٌّ لَا يَمُوتُ، بِيَدِهِ الْخَيْرُ وَهُوَ عَلَىٰ كُلِّ شَيْءٍ قَدِيرٌ

The Messenger of Allah (peace and blessings be upon him) said:

"Whoever enters the market and says: 'None has the right to be worshipped except Allah, alone, without partner. To Him belongs all sovereignty and praise. He gives life and causes death, and He is living and does not die. In His hand is all good, and He is Omnipotent over all things,' Allah will wipe a million bad deeds from his record, grant him a million good deeds, and elevate him a million degrees in virtue."
 

Duaa for Entering the Marketplace