Surah Al-Baqarah, verse 26

۞ إِنَّ ٱللَّهَ لَا يَسْتَحْىِۦٓ أَن يَضْرِبَ مَثَلًا مَّا بَعُوضَةً فَمَا فَوْقَهَا ۚ فَأَمَّا ٱلَّذِينَ ءَامَنُوا۟ فَيَعْلَمُونَ أَنَّهُ ٱلْحَقُّ مِن رَّبِّهِمْ ۖ وَأَمَّا ٱلَّذِينَ كَفَرُوا۟ فَيَقُولُونَ مَاذَآ أَرَادَ ٱللَّهُ بِهَـٰذَا مَثَلًا ۘ يُضِلُّ بِهِۦ كَثِيرًا وَيَهْدِى بِهِۦ كَثِيرًا ۚ وَمَا يُضِلُّ بِهِۦٓ إِلَّا ٱلْفَـٰسِقِينَ ﴿٢٦﴾

2:26 Allah is not ashamed to give a similitude of a mosquito or even something less [significant]. As for those who believe, they know that this is the truth from their Lord; but those who disbelieve, they say, “What does Allah mean by this similitude?” He causes many to go astray thereby and guides many thereby, but He causes none to go astray except the evildoers –