The eye as the strap of the rear

Nahj al-Balāgha|Volume 1|Book 3|Chapter 466

Book 3, Chapter 466

٤٦٦. وَقَالَ (عليه ‏السلام): الْعَيْنُ وِكَاءُ السَّهِ.

466. Amīr al-mu’minīn, peace be upon him, said: The eye is the strap of the rear.