Al‑Mahallī provided the core commentary from Surat al‑Kahf to the end, and after his death as‑Suyūṭī took up and completed the work — making it a compact yet powerful tafsir in one volume.
Their collaborative legacy has had enduring influence across the Muslim world: students routinely turn to Tafsir al‑Jalalayn as their first classical tafsir and reference on Qur’anic meaning.