﴿ قَوَارِيرَا۟ مِن فِضَّةٍۢ قَدَّرُوهَا تَقْدِيرًۭا ﴾

“crystal-like, [but] of silver - the measure whereof they alone will determine.”

crystal of silver that is they are made of silver which is transparent like crystal — which they that is the ones passing around them in service have measured in a precise measure according to the measure required by the one drinking it neither more nor less which makes for a most delightful drink.