Tafsir of Ad-Dukhan 44:56

ﻻ يذوقون فيها الموت إﻻ الموتة اﻻولى

They will never taste death therein except the first death, This is an exception which reinforces the negation. The meaning is that they will never taste death there. It was reported in the Two Sahihs that the Messenger of Allah said:

يوتى بالموت في صورة كبش أملح فيوقف بين الجنة والنار ثم يذبح ثم يقال يا أهل الجنة خلود فﻼ موت ويا أهل النار خلود فﻼ موت

Death will be brought forth in the image of a fine ram. It will be made to stand between Paradise and Hell, then it will be slaughtered. It will be said, "O people of Paradise, it is eternal, no more death; and O people of Hell, it is eternal, no more death.'' This Hadith was already quoted in our discussion of Surah Maryam. Abdur-Razzaq recorded that Abu Sa`id and Abu Hurayrah said, The Messenger of Allah said:

يقال ﻻهل الجنة

إن لكم أن تصحوا فﻼ تسقموا أبدا وإن لكم أن تعيشوا فﻼ تموتوا أبدا وإن لكم أن تنعموا فﻼ تبٲسوا أبدا وإن لكم أن تشبوا فﻼ تهرموا أبدا

It will be said to the people of Paradise, "It is granted to you that you will be healthy and will never fall ill, you will live and never die, you will enjoy a life of luxury and will never be miserable, you will be youthful and will never grow old.'' This was recorded by Muslim. It was reported that Abu Hurayrah, may Allah be pleased with him, said, The Messenger of Allah said:

من اتقى الله دخل الجنة ينعم فيها وﻻ يبٲس ويحيا فيها فﻼ يموت ﻻ تبلى ثيابه وﻻ يفنى شبابه

"Whoever has Taqwa of Allah, he will enter Paradise and enjoy a life of luxury and he will never be miserable. He will live therein and never die, his clothes will never wear out and his youth will never fade.''

ووقاهم عذاب الجحيم

and He will save them from the torment of the blazing Fire, means, along with this great and eternal blessing, He will also have saved them from the agonizing torment in the depths of Hell, so they will have achieved their desired aim and avoided the thing they feared. Allah says,

فضﻼ من ربك ذلك هو الفوز العظيم