Allah said,

وَهَـذَا كِتَابٌ ...

And this is a Book, (the Qur'an),

... أَنزَلْنَاهُ مُبَارَكٌ مُّصَدِّقُ الَّذِي بَيْنَ يَدَيْهِ وَلِتُنذِرَ أُمَّ الْقُرَى ...

Blessed, which We have sent down, confirming which came before it, so that you may warn the Mother of Towns,

that is, Makkah,

... وَمَنْ حَوْلَهَا ...

and all those around it...

referring to the Arabs and the rest of the children of Adam, Arabs and non-Arabs alike.

Allah said in other Ayat,

قُلْ يَأَيُّهَا النَّاسُ إِنِّى رَسُولُ اللَّهِ إِلَيْكُمْ جَمِيعًا

Say: "O mankind! Verily, I am sent to you all as the Messenger of Allah.'' (7:158)

and,

لاٌّنذِرَكُمْ بِهِ وَمَن بَلَغَ

"that I may therewith warn you and whomsoever it may reach.'' (6:19)

and,

وَمَن يَكْفُرْ بِهِ مِنَ الاٌّحْزَابِ فَالنَّارُ مَوْعِدُهُ

but those of the sects who reject it, the Fire will be their promised meeting place. (11:17)

and,

تَبَارَكَ الَّذِى نَزَّلَ الْفُرْقَانَ عَلَى عَبْدِهِ لِيَكُونَ لِلْعَـلَمِينَ نَذِيراً

Blessed be He Who sent down the criterion to His servant that he may be a warner to the Alamin (mankind and Jinn). (25:1)

and,

وَقُلْ لِّلَّذِينَ أُوتُواْ الْكِتَـبَ وَالاٍّمِّيِّينَ ءَأَسْلَمْتُمْ فَإِنْ أَسْلَمُواْ فَقَدِ اهْتَدَواْ وَّإِن تَوَلَّوْاْ فَإِنَّمَا عَلَيْكَ الْبَلَـغُ وَاللَّهُ بَصِيرٌ بِالْعِبَادِ

And say to those who were given the Scripture and to those who are illiterates: "Do you submit yourselves!'' If they do, they are rightly guided; but if they turn away, your duty is only to convey the Message; and Allah is All-Seer of (His) servants. (3:20)

It is recorded in the Two Sahihs, that the Messenger of Allah said,

أُعْطِيتُ خَمْسًا لَمْ يُعْطَهُنَّ أَحَدٌ مِنَ الْأَنْبِيَاءِ قَبْلِي

I have been given five things which were not given to any one else before me.

The Prophet mentioned among these five things,

وَكَانَ النَّبِيُّ يُبْعَثُ إِلَى قَوْمِهِ خَاصَّةً، وَبُعِثْتُ إِلَى النَّاسِ عَامَّة

Every Prophet was sent only to his nation, but I have been sent to all people.

This is why Allah said,

... وَالَّذِينَ يُؤْمِنُونَ بِالآخِرَةِ يُؤْمِنُونَ بِهِ ...

Those who believe in the Hereafter believe in it,

meaning, those who believe in Allah and the Last Day, believe in this blessed Book, the Qur'an, which We revealed to you, O Muhammad.

... وَهُمْ عَلَى صَلاَتِهِمْ يُحَافِظُونَ ﴿٩٢﴾

and they are constant in guarding their Salah.

for they perform what Allah ordered them, offering the prayers perfectly and on time.