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.