Surah Al-Jumu'ah 62:5

مَثَلُ ٱلَّذِينَ حُمِّلُوا۟ ٱلتَّوْرَىٰةَ ثُمَّ لَمْ يَحْمِلُوهَا كَمَثَلِ ٱلْحِمَارِ يَحْمِلُ أَسْفَارًۢا ۚ بِئْسَ مَثَلُ ٱلْقَوْمِ ٱلَّذِينَ كَذَّبُوا۟ بِـَٔايَـٰتِ ٱللَّهِ ۚ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّـٰلِمِينَ

The example of those who were entrusted with the Torah and then did not take it on is like that of a donkey who carries volumes [of books]. Wretched is the example of the people who deny the signs of Allāh. And Allāh does not guide the wrongdoing people.

Translation: Saheeh International

Tafsir

The likeness of those who were entrusted with the Torah those who were charged with implementing it then failed to uphold it then failed to act in accordance with it in what pertains to the descriptions of the Prophet s and so did not believe in him is as the likeness of an ass carrying books in that it does not …

Excerpt from Tafsir al-Jalalayn, commentary on 62:5, via Quran.com. The reader has the full commentary and 9 more tafsirs.