In fact Moksha = eternal birthless/ deathless state in Hinduism.
It’s equivalent in Islam, we can say, is life in Heaven. For a Muslim, life in Heaven is an eternal reward.
A ‘true Muslim’ is assured of the reward. Who is a true Muslim?
- One who does all the right things that Koran dictates. (Having total faith in Allah, doing daily Namaz, ete etc)
- One who does not do all the wrong things that Koran dictates (refraining from worshiping any other God, worshiping God with form or worshiping any human being; no drinking, no earning money through money-lending etc etc)
In Islam, there is no rebirth. This current life is just one. At the end of it, wait for the day of judgement in your grave. Allah would judge you based on your deeds during your lifetime and either you will end in heaven or in hell forever.
An Islamic heaven is a place of permanent enjoyment and merry making in the company of God. A Hindu’s heaven is not equivalent to Islam’s heaven. A Hindu’s heaven is not a moksha either. Hindu’s heaven is at the best a temporary stay of enjoyment of the fruits of good deeds till you exhaust them. It is said that there is no physical body for enjoyment, but only a subtle body (soul) where the enjoyment is only mental. You will have to return to earth afterwards. Coming and going will go on till you are freed of desires and wants and totally refine yourself— till you attain moksha. It is also believed that enjoyment in heaven is for extraordinary good deeds only. For not so great good deeds, the earth itself is the place of enjoyment (in the next birth).
An Islamic hell is a permanent and never ending place of suffering. There is no escape once one ends there. A Hindu’s hell is not equivalent to an Islam’s hell. It is just a temporary place of stay and suffering till you exhaust the effects of your evil karmas. Here again it is said that all the sufferings are mental only as there is no physical body. You then get a chance to take a rebirth in earth to refine yourself. Again, the punishment in hell is for any extraordinary acts of evil done in previous births. For other wrong doings, suffering comes in some way or other in the next birth. Any number of births may be there till you refine yourself completely and attain moksha.
A Hindu’s moksha is neither enjoyment equivalent to what you get in Heaven nor any suffering whatsoever. It is called Ananda — Bliss — total peace.