(Zukhuruf) 43 : 4
وَإِنَّهُ فِي أُمِّ الْكِتَابِ لَدَيْنَا لَعَلِيٌّ حَكِيمٌ

And It is in the Mother of the Book kept with Us, surely the Supreme, the Wise.

Mother of the Book is the Book recorded in the Disk kept safely as told in verses 85: 21-22. Since Surah Al- Fathiha contains the essence of Lord’s Book as a whole, It is also known as the Mother of the Book. As explained in verses 16: 43-44 and 21: 24, the Book revealed from Lord to all 313 Messengers were Adhikr. But the last Messenger and prophet Muhammad has received Al-Kithab-Mother of the Book-including Fathiha and Adhikr. Adhikr is the Best Interpretation of Lord’s Book, and the Arabic Qur’an reading Fujjar who do not testify It will be dragged prone on their faces into the hell, such are in the worst places and are the most strayed as explained in verses 16: 89; 17: 97-98; and 25: 33-34.  See explanation 2: 2; 13: 39; 15: 87; and 39: 23.