Tafsir of Al-Waqi'ah 56:19

Wherefrom neither Yusadda`un nor Yunzifun. meaning, they will never get headaches from this wine nor intoxicated. Rather, this wine does not affect their minds, even though it has a strong and tremendously delightful taste. Ad-Dahhak reported from Ibn Abbas: "The wine (of this life) has four side-effects, - it intoxicates, - gives headaches, - induces vomiting and - causes excessive urine. So Allah mentioned the wine of Paradise free of these characteristics.'' Mujahid, Ikrimah, Sa`id bin Jubayr, Atiyah Al-Awfi, Qatadah and As-Suddi said that Allah's statement,

ﻻ يصدعون عنها

(Wherefrom neither Yusadda`un) means, "It does not give them a headache.'' While they said that

وﻻ ينزفون

(nor will they Yunzifun) means that "It does not change their sense of reasoning.'' Allah's statement,

وفاكهة مما يتخيرون