In Sahih Bukhari hadith 3293 and Sahih Muslim 2691 this is what was Prophet Muhammad (ﷺ) tries to relay.
Narrated Abu Huraira:
Allah’s Messenger (ﷺ) said, “If one says one-hundred times in one day: “None has the right to be worshipped but Allah, the Alone Who has no partners, to Him belongs Dominion and to Him belong all the Praises, and He has power over all things (i.e. Omnipotent)”, one will get the reward of manumitting ten slaves, and one-hundred good deeds will be written in his account, and one-hundred bad deeds will be wiped off or erased from his account, and on that day he will be protected from the morning till evening from Satan, and nobody will be superior to him except one who has done more than that which he has done.”
WHAT IS THIS DUA IN ARABIC?
لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ، لَهُ الْمُلْكُ، وَلَهُ الْحَمْدُ، وَهُوَ عَلَى كُلِّ شَىْءٍ قَدِيرٌ‏
The transliteration of this dua in english is, La ilaha illallahu wahdahu la sharika lahu lahul mulku wa lahul hamdu wa huwa ala kulli shay in qadeer