Explained in Detail
إِنَّ ٱلَّذِينَ قَالُوا۟ رَبُّنَا ٱللَّهُ ثُمَّ ٱسْتَقَـٰمُوا۟ تَتَنَزَّلُ عَلَيْهِمُ ٱلْمَلَـٰٓئِكَةُ أَلَّا تَخَافُوا۟ وَلَا تَحْزَنُوا۟ وَأَبْشِرُوا۟ بِٱلْجَنَّةِ ٱلَّتِى كُنتُمْ تُوعَدُونَ
Indeed, those who have said, "Our Lord is Allah " and then remained on a right course - the angels will descend upon them, [saying], "Do not fear and do not grieve but receive good tidings of Paradise, which you were promised.
Nearby ayahs help place verse 41:30 in sequence and meaning.
ذَٰلِكَ جَزَآءُ أَعْدَآءِ ٱللَّهِ ٱلنَّارُ ۖ لَهُمْ فِيهَا دَارُ ٱلْخُلْدِ ۖ جَزَآءًۢ بِمَا كَانُوا۟ بِـَٔايَـٰتِنَا يَجْحَدُونَ
That is the recompense of the enemies of Allah - the Fire. For them therein is the home of eternity as recompense for what they, of Our verses, were rejecting.
وَقَالَ ٱلَّذِينَ كَفَرُوا۟ رَبَّنَآ أَرِنَا ٱلَّذَيْنِ أَضَلَّانَا مِنَ ٱلْجِنِّ وَٱلْإِنسِ نَجْعَلْهُمَا تَحْتَ أَقْدَامِنَا لِيَكُونَا مِنَ ٱلْأَسْفَلِينَ
And those who disbelieved will [then] say, "Our Lord, show us those who misled us of the jinn and men [so] we may put them under our feet that they will be among the lowest."
نَحْنُ أَوْلِيَآؤُكُمْ فِى ٱلْحَيَوٰةِ ٱلدُّنْيَا وَفِى ٱلْـَٔاخِرَةِ ۖ وَلَكُمْ فِيهَا مَا تَشْتَهِىٓ أَنفُسُكُمْ وَلَكُمْ فِيهَا مَا تَدَّعُونَ
We [angels] were your allies in worldly life and [are so] in the Hereafter. And you will have therein whatever your souls desire, and you will have therein whatever you request [or wish]
نُزُلًا مِّنْ غَفُورٍ رَّحِيمٍ
As accommodation from a [Lord who is] Forgiving and Merciful."