Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abu Ayyub Ansari (may Allah be pleased with him), the Noble Prophet (peace and blessings be upon him) said: "Whoever recites this supplication ten times in the morning: «لَا إِلَهَ إِلَّا اللهُ ، وَحْدَهُ لَا شَرِيكَ لَهُ ، لَهُ الْمُلْكُ، وَلَهُ الْحَمْدُ ، يُحْيِي وَيُمِيتُ ، وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ» Allah is the only true deity, He is alone, He has no partner, sovereignty belongs to Him, all praise is for Him, He gives life and causes death, and He is powerful over everything. Then Allah Almighty will write ten good deeds for him for each time, forgive ten sins, raise him ten ranks, these words will be equal in reward to freeing ten slaves for him, and they will protect him from morning till evening, and on that day, no deed of anyone will surpass this deed. If he recites this in the evening, he will receive the same reward."