Quran 9:113 from Surah At-Tawba on Divine Marvels.
مَا كَانَ لِلنَّبِيِّ وَٱلَّذِينَ ءَامَنُوٓاْ أَن يَسۡتَغۡفِرُواْ لِلۡمُشۡرِكِينَ وَلَوۡ كَانُوٓاْ أُوْلِي قُرۡبَىٰ مِنۢ بَعۡدِ مَا تَبَيَّنَ لَهُمۡ أَنَّهُمۡ أَصۡحَٰبُ ٱلۡجَحِيمِ
English translation: Not (it) is for the Prophet and those who believe that they ask forgiveness for the polytheists even though they be near of kin near of kin after after [what] has become clear to them that they (are the) companions (of) the Hellfire
Transliteration: ma kana lilnnabiyyi wa-alladhina amanu an yastaghfiru lil'mush'rikina walaw kanu uli qur'ba min ba'di ma tabayyana lahum annahum ashabu al-jahimi