ثُمَّ فِى سِلْسِلَةٍ ذَرْعُهَا سَبْعُونَ ذِرَاعًا فَٱسْلُكُوهُ

Thumma fee silsilatin tharAAuhasabAAoona thiraAAan faslukooh

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