What is the reward of the one who dies upon Islam?

Islam is obligatory upon the entire Ummah. There is neither salvation nor happiness except with Islam. Therefore, whoever dies upon Islam (i.e., as a muslim), for him is Paradise, either from the very first moment if he is free from sins, or after the punishment that Allāh ﷻ has decreed for him due to his sins which he died upon, if Allāh doesn’t pardon him for them. So, salvation is only through Islam. (Allāh ﷻ) said, “And whoever seeks a religion other than Islam, it will never be accepted from him” [Al Imran 3:85] Whoever dies up on (a religion) other than Islam, even if he had good deeds the size of mountains, it is in vain. (Allāh ﷻ said) ﴾ And We shall turn to whatever deeds they (disbelievers, polytheists, sinners) did, and We shall make such deeds as scattered floating particles of dust. ﴿ [Al-Furqān (25):23] One must have Tawḥīd, (must) bear witness that there is no deity worthy of worship in truth except Allāh and that Muḥammad is The Messenger of Allāh, and (must) enter into Islam with his heart and soul. Then, after that (come) actions. Whoever is steadfast in regard to (righteous) actions, enters Paradise from the very first moment. And whoever falls short in any of the deeds that are obligatory upon him, or commits sins that Allāh ﷻ has forbidden for him, comes under The Will (of Allāh ﷻ) If Allāh ﷻ wills, He will forgive him, and if He wills, He will punish him according to the sins he has. As (Allāh ﷻ) said, ﴾ Verily! Allāh forgives not (the sin of) setting up partners (in worship) with Him, but He forgives anything less than that for whomever He wills ﴿ [Al-Nisāʾ (4):116]. Thus, whoever Allāh ﷻ guides to Islam and is free from Shirk (associating partners with Allāh), is upon a path of salvation.