Musannaf Ibn Abi Shaybah 38200 — Sayings of Mujahid

Mujahid is reported to have said, in the explanation of the saying of Allah Almighty, "And there will be passed round among them vessels of silver and goblets of crystal, crystal of silver, which they have measured out precisely" [Al-Insan: 15-16], that "vessels" means drinking bowls, and "goblets" means cups, and "measured out precisely" means that they are neither so full that they overflow nor short of the measure.