Salaam,
The seven " mina almathani " in chapter 15.https://www.islamawakened.com/quran/15/87/15:87 We have given thee
seven "
of the oft-repeated (verses) / mina almathani" and the great Quran.
http://arabiclexicon.hawramani.com/%d8%ab%d9%86%d9%89/?book=50#cab477almathani المثاني from the root :
Tha Noon Ya ثنىثنىى1 ثَنَاهُ, (T, S, M, Mgh, Msb, K,) said in the K to be like سَعَى, implying that the aor. is ثَنَىَ, but this is a mistake, (MF, TA,)
[for it is well known that] the aor. is ثَنِىَ, (Msb,) inf. n. ثَنْىٌ, (S, M, Msb, &c.,) He doubled it, or folded it; (T;) he turned one part of it upon another; (M, K;) he bent it; (T, S, Mgh, Msb, TA;) he drew, or contracted, one of its two extremities to [or towards] the other; or joined, or adjoined, one of them to the other; thus bending it; (Mgh;) namely, a stick, or branch, or twig, (Mgh,) or a thing, (T, S, M, Msb, K,) of any kind
- An interesting observation: in chapter 15 there are 7 verses which are repeated in chapter 38.- This narrative is about "sujud to Adam/bashar" and is also mentioned seven times in the Quran:
https://www.islamawakened.com/quran/2/34/https://www.islamawakened.com/quran/7/11/https://www.islamawakened.com/quran/15/29/https://www.islamawakened.com/quran/17/61/https://www.islamawakened.com/quran/18/50/https://www.islamawakened.com/quran/20/116/https://www.islamawakened.com/quran/38/72/- List of the the 78 verse repeated twice in the Quran.Source:
Quran Uthmani Script
The software to count verses , words and letters,....( Arabic)
http://www.kaheel7.com/ar/index.php/...07-03-19-11-02or
https://drive.google.com/file/d/0B9obKsQW-2LlazNfQjRGYS1ORlk/viewوالله اعلم
Allah knows best.