You shall certainly travel from stage to stage (in this life and in the Hereafter).
Nay, (on the contrary), those who disbelieve, belie [Prophet Muhammad (Peace be upon him) and whatever he brought, i.e. this Quran and Islamic Monotheism, etc.].
And Allah knows best what they gather (of good and bad deeds)
So announce to them a painful torment.
Save those who believe and do righteous good deeds, for them is a reward that will never come to an end (i.e. Paradise).
Chapter 84 Al-‘Inshiqāq : Verses 19-25
Swearing by the Various Stages of Man’s Journey
(You shall certainly travel from stage to stage.) Al-Bukhari recorded from Mujahid that Ibn `Abbas said,
(You shall certainly travel from stage to stage.) “Stage after stage. Your Prophet has said this.” Al-Bukhari recorded this statement with this wording. `Ikrimah said,
(From stage to stage.) “Stage after stage. Weaned after he was breast feeding, and an old man after he was a young man.” Al-Hasan Al-Basri said,
(From stage to stage.) “Stage after stage. Ease after difficulty, difficulty after ease, wealth after poverty, poverty after wealth, health after sickness, and sickness after health.”
The Disapproval of Their Lack of Faith, giving Them Tidings of the Torment
(What is the matter with them, that they believe not And when the Qur’an is recited to them, they fall not prostrate.) meaning, what prevents them from believing in Allah, His Messenger and the Last Day, and what is wrong with them that when Allah’s Ayat and His Words are recited to them they do not prostrate due to awe, respect and reverence Concerning Allah’s statement,
(Nay, those who disbelieve deny.) meaning, from their mannerism is rejection, obstinacy, and opposition to the truth.
(And Allah knows best what they gather,) Mujahid and Qatadah both said, “What they conceal in their chests.”
(So, announce to them a painful torment.) meaning, `inform them, O Muhammad, that Allah has prepared for them a painful torment.’ Then Allah says,
(Save those who believe and do righteous good deeds,) This is a clear exception meaning, `but those who believe.’ This refers to those who believe in their hearts. Then the statement, “and do righteous good deeds,” is referring to that which they do with their limbs.
(for them is a reward) meaning, in the abode of the Hereafter.
(that will never come to an end.) Ibn `Abbas said, “Without being decreased.” Mujahid and Ad-Dahhak both said, “Without measure.” The result of their statements is that it (the reward) is without end. This is as Allah says,
(A gift without an end.) (11:108) As-Suddi said, “Some of them have said that this means without end and without decrease.”