Surah Al-Hijr 15:91

ٱلَّذِينَ جَعَلُوا۟ ٱلْقُرْءَانَ عِضِينَ

Who have made the Qur’ān into portions.

Translation: Saheeh International

Tafsir

those who have reduced the Recitation namely those scriptures revealed to them to parts believing in some and disbelieving in others. It is alternatively said that the individuals meant here were those who ‘divided up’ among themselves the roads to Mecca barring people from Islam. …

Excerpt from Tafsir al-Jalalayn, commentary on 15:91, via Quran.com. The reader has the full commentary and 9 more tafsirs.