[15].Surah Al-Hjir [The Rocky Tract] : Ayat 9-10

Ayat 9. Verily We: It is We Who have sent down the Dhikr (the Quran) and surely, We will guard it (from corruption) .

Ayat 10. Indeed, We sent Messengers before you (O Muhammad  [SAWW](PBUH) amongst the sects (communities) of old.

Hazrat Ibn `Abbas (May Allah be pleased with them) reported: The Messenger of Allah (PBUH) said, "He who does not memorize any part from the Qur'an he is like the ruined house.''

[At-Tirmidhi Hadith # 2913]. 

Lesson : as mentioned above in Surah Al-Hjir Ayat 09. "We Who have sent down the Dhikr (the Quran) and surely, We will guard it" This Hadith means that the heart of that Muslim is devoid of grace of spiritualism and Grace of Allah who does not remember by heart any portion of the Qur'an, in the same way as a deserted house is deprived of inhabitants and Blessings of Allah. What we learn from this is that every Muslim must remember some portion of the Qur'an so that he is safe from the admonition mentioned in this Hadith.