Verily, the Muslims (those who submit to Allāh in Islām) men and women, the believers men and women (who believe in Islāmic Monotheism), the men and the women who are obedient (to Allāh), the men and women who are truthful (in their speech and deeds), the men and the women who are patient (in performing all the duties which Allāh has ordered and in abstaining from all that Allāh has forbidden), the men and the women who are humble (before their Lord Allāh), the men and the women who give Sadaqāt (i.e. Zakāt, and alms, etc.), the men and the women who observe Saum (fast) (the obligatory fasting during the month of Ramadān, and the optional Nawāfil fasting), the men and the women who guard their chastity (from illegal sexual acts) and the men and the women who remember Allāh much with their hearts and tongues (while sitting, standing, lying, etc. for more than 300 times extra over the remembrance of Allāh during the five compulsory congregational prayers) or praying extra additional Nawāfil prayers of night in the last part of night, etc.) Allāh has prepared for them forgiveness and a great reward (i.e. Paradise). (Al-Ahzab 33:35)
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a) Remember Allâh while sitting, standing, lying, for more than 300 times extra over the remembrance of Allâh during the five compulsory congregational prayers or praying extra additional Nawâfil prayers of night in the last part of night.
b) See the footnote of (V.13:28).
c) Narrated Abû Hurairah [radhi-yAllâhu 'anhu]: Allâh's Messenger [sal-Allâhu 'alayhi wa sallam] said, "Allâh has some angels who look for those who remember (glorify the Praises of) Allâh on the roads and paths. And when they find some people remembering (glorifying the Praises of) Allâh, they call each other saying, 'Come to the object of your pursuit.' " He added, "Then the angels encircle them with their wings up to the nearest heaven to us." He added, "[After those people remembered (glorified the Praises of) Allâh, and the angels go back to Allâh], their Lord [Subhânahu wa Ta'âla] asks them (those angels) though He knows better than them 'What do My slaves say?' The angels reply, 'They say: Subhân-Allâh, Allâhu Akbar, and Al-hamdu lillâh'. Allâh then says, 'Did they see Me?' The angels reply, 'No! By Allâh, they didn't see You.' Allâh says, 'How it would have been if they saw me?' The angels reply, 'If they saw You, they would worship You more devoutly and remember You (glorify Your Praises) more deeply, and declare Your freedom from any resemblance to anything more often.' Allâh says (to the angels), 'What do they ask Me for?' The angels reply, 'They ask You for Paradise.' Allâh says (to the angels), 'Did they see it?' The angels say, 'No! By Allâh, O Lord! They did not see it.' Allâh says, 'How it would have been if they saw it?' The angels say, 'If they saw it, they would have greater covetousness for it and would seek it with greater zeal and would have greater desire for it.' Allâh says, 'From what do they seek refuge?' The angels reply, 'They seek refuge from the (Hell) Fire.' Allâh says, 'Did they see it?' The angels say, 'No! By Allâh, O Lord! They did not see it.' Allâh says, 'How it would have been if they saw it?' The angels say, 'If they saw it they would flee from it with the extreme fleeing and would have extreme fear from it.' Then Allâh says, 'I make you witnesses that I have forgiven them.' " (Allâh's Messenger [sal-Allâhu 'alayhi wa sallam] added:) "One of the angels would say, 'There was so-and-so amongst them, and he was not one of them, but he had just come for some need.' Allâh would say, 'These are those people whose companions will not be reduced to misery.' "
[Sahih Al-Bukhâri, 8/6408 (O.P.417)]