Surah Al-Baqarah 2:26

۞ 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

Indeed, Allāh is not timid to present an example - that of a mosquito or what is smaller than it. And those who have believed know that it is the truth from their Lord. But as for those who disbelieve, they say, "What did Allāh intend by this as an example?" He misleads many thereby and guides many thereby. And He misleads not except the defiantly disobedient,

Translation: Saheeh International

Tafsir

God is not ashamed to strike to make a similitude mathal is the first direct object; mā either represents an indefinite noun described by what comes after it and constitutes a second direct object meaning ‘whatever that similitude may be’; …

Excerpt from Tafsir al-Jalalayn, commentary on 2:26, via Quran.com. The reader has the full commentary and 9 more tafsirs.