It is reported that Ibn ʿUmar - Allāh be pleased with him - said, "We were the beginning [the heads] of this Ummah, and perhaps a man from the best of the Companions of Allāh's Messenger - Allāh's peace and blessings be upon him - and the most righteous amongst them could maintain only one chapter of the Qur'ān or thereabouts. For the Qur'ān was weighty upon them, and they were given knowledge of it or action based on it. But the last of this Ummah will find the Qur'ān light [and easy] - the child and the non-Arab will recite it, without possessing any knowledge about it."

Al-Harawī, Dhamm Al-Kalām wa Ahlihī Vol. 5 p144.