After the final tashahhud, before salam
اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ جَهَنَّمَ، وَمِنْ عَذَابِ الْقَبْرِ، وَمِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ، وَمِنْ شَرِّ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ
Transliteration: Allahumma inni a‘udhu bika min ‘adhabi Jahannam, wa min ‘adhabil-qabr, wa min fitnatil-mahya wal-mamat, wa min sharri fitnatil-Masihid-Dajjal.
Meaning: O Allah, I seek refuge in You from the punishment of Jahannam, from the punishment of the grave, from the trials of life and passing, and from the evil trial of the False Messiah.
Qur’anic dua for this world, the Hereafter, and the Fire
رَبَّنَا آتِنَا فِي الدُّنْيَا حَسَنَةً وَفِي الْآخِرَةِ حَسَنَةً وَقِنَا عَذَابَ النَّارِ
Transliteration: Rabbana atina fid-dunya hasanah wa fil-akhirati hasanah wa qina ‘adhaban-nar.
Meaning: Our Lord, give us good in this world and good in the Hereafter, and protect us from the punishment of the Fire.
Dua of the servants of ar-Rahman
رَبَّنَا اصْرِفْ عَنَّا عَذَابَ جَهَنَّمَ ۖ إِنَّ عَذَابَهَا كَانَ غَرَامًا
Transliteration: Rabbana isrif ‘anna ‘adhaba Jahannam, inna ‘adhabaha kana gharama.
Meaning: Our Lord, turn away from us the punishment of Jahannam. Indeed, its punishment is ever clinging.
Dua while reflecting on creation
رَبَّنَا مَا خَلَقْتَ هَٰذَا بَاطِلًا سُبْحَانَكَ فَقِنَا عَذَابَ النَّارِ
Transliteration: Rabbana ma khalaqta hadha batila, subhanaka faqina ‘adhaban-nar.
Meaning: Our Lord, You did not create this without purpose. Glory be to You, so protect us from the punishment of the Fire.