"Say to the believing men that they should lower their gaze and guard their private parts; that will make for greater purity for them. Indeed, Allāh is well acquainted with all that they do." [an-Nur (24):30]

 

Imaam ibn al-Qayyim (رحمه الله) mentioned that from the benefits in lowering the gaze:

أنه يمنع من وصول أثر السهم المسموم الذي لعل فيه هلاكه إلى قلبه

It prevents the effects of the poisonous arrow from reaching his heart, which may lead to his destruction.

[Ad-Daa’ wad-Dawa’]

Translated by Markaz Mu’aadh