Sura 69 Al-Haqqа (The Inevitable), ayah 32

1. ثُمَّ فِي سِلْسِلَةٍ ذَرْعُهَا سَبْعُونَ ذِرَاعًا فَاسْلُكُوهُ

   Then into a chain whose length is seventy cubits insert him."

   69:32

Translation: Saheeh International