عَنْ أَبِي أَيُّوبَ الْأَنْصَارِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((مَنْ قَالَ إِذَا صَلَّى الصُّبْحَ لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ عَشْرَ مَرَّاتٍ كُنَّ كَعَدْلِ أَرْبَعِ رِقَابٍ وَكُتِبَ لَهُ بِهِنَّ عَشْرُ حَسَنَاتٍ وَمُحِيَ عَنْهُ بِهِنَّ عَشْرُ سَيِّئَاتٍ وَرُفِعَ لَهُ بِهِنَّ عَشْرُ دَرَجَاتٍ وَكُنَّ لَهُ حَرَسًا مِنَ الشَّيْطَانِ حَتَّى يُمْسِيَ، وَإِذَا قَالَهَا بَعْدَ الْمَغْرِبِ فَمِثْلُ ذَلِكَ))
Sayyiduna Abu Ayyub Ansari (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Whoever, after performing the Fajr prayer, recites this supplication ten times: LAA ILAAHA ILLALLAHU WAHDAHU LAA SHAREEKA LAHU, LAHUL-MULKU WA LAHUL-HAMDU WA HUWA ‘ALAA KULLI SHAY’IN QADEER, it will be equal to freeing four slaves, and in return, ten good deeds will be written for him, ten sins will be erased, his ten ranks will be elevated, and these words will protect him from Satan until the evening. And if he recites them after Maghrib, it will be the same.