Among all masnun dhikr, this one is very special -
لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيْكَ لَهُ، لَهُ الْمُلْكُ، وَلَهُ الْحَمْدُ، وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيْرٌ
Transliteration
Laa 'ilaaha 'illAllahu wa'hdahu laa shareeka lahu, lahul-mulku wa lahul-hamdu, wa Huwa 'alaa kulli shay'in Qadeer.
Translation
None has the right to be worshipped except Allah, He is alone, without any partner, to Him belong all sovereignty and praise, and He is over all things omnipotent.
Say la ilaha illallah when you wake up and before sleep. Your heart stays close to Allah. You praise Him and remember He has power over all things in your life.
Big rewards come. You get rewards like freeing ten slaves, one hundred good deeds, one hundred sins erased, and shaitan cannot harm you all day.
Muslims say duas like Allaahumma bika asbahnaa and azkar sabah. These help you start and end your day with thanks, remembrance, and safety.
Read Surah al-Ikhlas, Surah al-Falaq, and Surah an-Nas three times each. These three Quls are sunnah for protection.
You get special rewards, forgiveness, safety from evil, and closeness to Allah. It is powerful dhikr for morning and evening.
The full dua is: La ilaha illallah, wahdahu la sharika lah, lahul mulku wa lahul hamdu wa huwa ala kulli Shai in Qadir. Say this dhikr daily for blessings and protection.