Quran 2:26 from Surah Al-Baqara on Divine Marvels.
۞إِنَّ ٱللَّهَ لَا يَسۡتَحۡيِۦٓ أَن يَضۡرِبَ مَثَلٗا مَّا بَعُوضَةٗ فَمَا فَوۡقَهَاۚ فَأَمَّا ٱلَّذِينَ ءَامَنُواْ فَيَعۡلَمُونَ أَنَّهُ ٱلۡحَقُّ مِن رَّبِّهِمۡۖ وَأَمَّا ٱلَّذِينَ كَفَرُواْ فَيَقُولُونَ مَاذَآ أَرَادَ ٱللَّهُ بِهَٰذَا مَثَلٗاۘ يُضِلُّ بِهِۦ كَثِيرٗا وَيَهۡدِي بِهِۦ كَثِيرٗاۚ وَمَا يُضِلُّ بِهِۦٓ إِلَّا ٱلۡفَٰسِقِينَ
English translation: Indeed Allah (is) not ashamed to set forth an example (like) even (of) a mosquito and (even) something above it Then as for those who believed [thus] they will know that it (is) the truth from their Lord And as for those who disbelieved [thus] they will say what (did) intend Allah by this example He lets go astray by it many and He guides by it many And not He lets go astray by it except the defiantly disobedient
Transliteration: inna al-laha la yastahyi an yadriba mathalan ma ba'udatan fama fawqaha fa-amma alladhina amanu faya'lamuna annahu al-haqu min rabbihim wa-amma alladhina kafaru fayaquluna madha arada al-lahu bihadha mathalan yudillu bihi kathiran wayahdi bihi kathiran wama yudillu bihi illa al-fasiqina