لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ، يُحْيِي وَيُمِيتُ، وَهُوَ حَيٌّ لَا يَمُوتُ، بِيَدِهِ الْخَيْرُ، وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ
Transliteration
La ilaha illallahu wahdahu la sharika lahu, lahul-mulku wa lahul-hamdu, yuhyi wa yumitu, wa huwa hayyun la yamutu, biyadihil-khayru, wa huwa 'ala kulli shay'in qadir
English meaning
There is no deity except Allah, alone without partner. To Him belongs dominion and praise. He gives life and causes death; He is Living and never dies. In His hand is all good, and He is over all things competent.
When is it recited?
When entering the marketplace.
Its virtue
Whoever recites this has a million good deeds written, a million sins erased, and his rank raised a million degrees.
Source
Tirmidhi, Da'awat 36