Dua for Protection from illness and Hellfire

لَا إِلَهَ إِلَّا اللَّهُ وَاللَّهُ أَكْبَرُ، لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ، لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ، لَا إِلَهَ إِلَّا اللَّهُ لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ، لَا إِلَهَ إِلَّا اللَّهُ وَلَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ

Transliteration

Laa 'ilaaha 'illAllahu wAllahu 'Akbar, laa 'ilaaha 'illAllahu wahdahu, laa 'ilaaha 'illAllahu wahdahu laa shareeka lahu, laa 'ilaaha 'illAllahu lahul-mulku wa lahul-hamdu, laa 'ilaaha 'illAllahu wa laa hawla wa laa quwwata 'illaa billaah

Meaning

There is none worthy of worship but Allah, Allah is the Most Great. None has the right to be worshipped but Allah alone. None has the right to be worshipped but Allah alone, Who has no partner. There is none worthy of worship but Allah, His is the dominion and His is the praise. There is none worthy of worship but Allah, there is no power and no might but by Allah.

Source: Sahih. Tirmidhi: 3430