Surah Al-Hijr Ayat 87 (15:87 Quran)

 Surah Al-Hijr Ayat 87 (15:87 Quran)

And We have bestowed upon thee "Seven Mathanni" and the Grand Quran. Quran[15–87]

"Mathanni-مثانی" is Plural of the passive noun(مثنیه) from "Thani-ثنی" meaning to turn and torsion; like, a river that twists and turns in some parts of its path, and it is its "Mathanni", where due to this flexibility, the part before the turn of the river and the part after it watch over each other.

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And indeed, We have bestowed upon you seven of Al-Mathani (the seven repeatedly recited Verses), (i.e. Surat Al-Fatiha) and the Grand Quran.