Imaam ibn Qayyim رحمه الله رحمة واسعة said:
“The people of the Quraan are those who are knowledgeable regarding it, and act upon what is in it even if they haven’t memorized it in their hearts.
And as for the one who has memorized it but has not understood it and does not act upon what is in it, then he is not from its people even if he implemented and established its letters (rules of tajweed) like an arrow (with precision).”
[Zaad al-M’aad 1/327]