قَوَارِيرَا۟ مِن فِضَّةٍ قَدَّرُوهَا تَقْدِيرًا 
  Qaw a reera min fi dd atin qaddarooh a  taqdeer a  n      crystal-like, [but] of silver - the measure whereof they alone    will determine.16
   - Mohammad Asad
 
        
    
    
and goblets made of crystal-clear silver, filled by their    attendants in due measure.
   - Muhammad Farooq-i-Azam Malik
   crystalline silver, filled precisely as desired.
   - Mustafa Khattab
     
(Bright as) glass but (made) of silver, which they (themselves)    have measured to the measure (of their deeds).
   - Marmaduke Pickthall
   Crystal-clear made of silver: they will determine the measure    thereof (according to their wishes). 5848
   - Abdullah Yusuf Ali