Wallatheena amanoo waAAamiloo assalihati waamanoo bima nuzzila AAala muhammadin wahuwa alhaqqu min (surah Muhammad: 2)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(47:2) As for those who attained to faith and did righteous works and believed in what was revealed to Muhammad *4 ' which indeed is the Truth from their Lord *5 ' Allah has remitted their evil deeds and has set their condition right. *6

Wallazeena aamanoo wa `amilus saalihaati wa aamanoo bimaa nuzzila `alaa Muhammadinw-wa huwal haqqu mir Rabbihim kaffara `anhum saiyiaatihim wa aslaha baalahum

*4) Although after saying alladhina amanu (those who believed) there was no need to say wa amanu bi-ma nuzzila 'ala Muhammed-in (and accepted that which has been sent down to Muhammad), for belief by itself implies believing in the Holy Prophet Muhammad and in the teachings sent down to him, yet making a separate mention of it is particularly meant to assert this: After the appointment of Muhammad (upon whom be Allah's peace and blessings) to Prophethood, a person's belief in Allah and the Hereafter and the former Messengers and the Books cannot be beneficial until he also believes in him and the teachings brought by him. This explanation was necessary because after the emigration, the Muslims had also to deal with those people, who recognized and accepted all the requirements of the Faith but refused to acknowledge and accept the Prophethood of the Holy Prophet Muhammad (upon whom be Allah's peace and blessings).
*5) This has two meanings: (l) That Allah wiped off from their record all those sins which they had happened to commit in the pre-Islamic days of ignorance: now, they will not at alI be held accountable for them; and (2) that Allah removed from them the evils of creed, thought, morals and action in which they were involved. Now their minds were changed; their creed and ideas were changed; now there was faith in their hearts instead of ignorance and righteous acts instead of the immoral evil.
*6) This also has two meanings: (1) That Allah changed their previous condition and put them on the right path and improved and bettered their lives for them; and (2) that AIlah has taken them out of the condition of weakness and helplessness and oppression in which they were placed till then; now He has created for them such conditions in which instead of being persecuted they will defend themselves against the oppressors; instead of living as subjects, they will now live and order their lives as free people, and will have the upper hand instead of being subdued and suppressed.