Quran 40:49 from Surah Ghafir on Divine Marvels.
وَقَالَ ٱلَّذِينَ فِي ٱلنَّارِ لِخَزَنَةِ جَهَنَّمَ ٱدۡعُواْ رَبَّكُمۡ يُخَفِّفۡ عَنَّا يَوۡمٗا مِّنَ ٱلۡعَذَابِ
English translation: And will say those in the Fire to (the) keepers (of) Hell Call your Lord (to) lighten for us a day of the punishment
Transliteration: waqala alladhina fi al-nari likhazanati jahannama id'u rabbakum yukhaffif anna yawman mina al-'adhabi