Our Prophet was sent to recite and call to Allah's Revelation Allah says, كَذَلِكَ أَرْسَلْنَاكَ فِي أُمَّةٍ قَدْ خَلَتْ مِن قَبْلِهَا أُمَمٌThus have We sent you to a community before whom other communities have passed away,Allah says, `Just as We sent you, O Muhammad, to your Ummah,لِّتَتْلُوَ عَلَيْهِمُ الَّذِيَ أَوْحَيْنَا إِلَيْكَin order that you might recite unto them what We have revealed to you,so that you deliver to them Allah's Message. Likewise, We sent others to earlier nations that disbelieved in Allah. The Messengers whom We sent before you, were also denied and rejected, so you have an example in what they faced. And since We sent Our torment and revenge on those people, then let these people fear what will strike them, for their denial of you is harsher than the denial that the previous Messengers faced,'تَاللَّهِ لَقَدْ أَرْسَلْنَأ إِلَى أُمَمٍ مِّن قَبْلِكَBy Allah, We indeed sent (Messengers) to the nations before you. (16-63)Allah said in another Ayah,وَلَقَدْ كُذِّبَتْ رُسُلٌ مِّن قَبْلِكَ فَصَبَرُواْ عَلَى مَا كُذِّبُواْ وَأُوذُواْ حَتَّى أَتَـهُمْ نَصْرُنَا وَلَا مُبَدِّلَ لِكَلِمَـتِ اللَّهِ وَلَقدْ جَأءَكَ مِن نَّبَإِ الْمُرْسَلِينَVerily, many Messengers were denied before you, with patience they bore the denial and suffering until; till Our help reached them, and none can alter the Words (decree) of Allah. Surely, there has reached you the information (news) about the Messengers (before you). (6-34),meaning, `How We gave them victory and granted the best end for them and their followers in this life and the Hereafter. 'Allah said next,وَهُمْ يَكْفُرُونَ بِالرَّحْمَـنِwhile they disbelieve in the Most Gracious (Allah).Allah says, `These people, that We sent you to, disbelieve in the Most Gracious and deny Him, because they dislike describing Allah by Ar-Rahman,Ar-Rahim (the Most Gracious, Most Merciful).'This is why on the day of Al-Hudaybiyyah, as Al-Bukhari narrated, they refused to write, "In the Name of Allah, Ar-Rahman Ar-Rahim," saying, "We do not know Ar-Rahman,Ar-Rahim!"Qatadah narrated this words. Allah the Exalted said,قُلِ ادْعُواْ اللَّهَ أَوِ ادْعُواْ الرَّحْمَـنَ أَيًّا مَّا تَدْعُواْ فَلَهُ الاٌّسْمَأءَ الْحُسْنَىSay:"Invoke Allah or invoke the Most Gracious (Allah), by whatever name you invoke Him, for to Him belong the Best Names. (17:110)In his Sahih, Imam Muslim recorded that Abdullah bin Umar said that the Messenger of Allah said,إِنَّ أَحَبَّ الاَْسْمَاءِ إِلَى اللهِ تَعَالَى عَبْدُاللهِ وَعَبْدُ الرَّحْمَنThe most beloved names to Allah the Exalted are:Abdullah and Abdur-Rahman. Allah said next,قُلْ هُوَ رَبِّي لا إِلَـهَ إِلاَّ هُوَ Say:"He is my Lord! None has the right to be worshipped but He!"meaning:for I believe in Allah in Whom you disbelieve and affirm His Divinity and Lordship. He is my Lord, there is no deity worthy of worship except Him,عَلَيْهِ تَوَكَّلْتُIn Him is my trust,in all of my affairs,وَإِلَيْهِ مَتَابِand to Him I turn.meaning:to Him I return and repent, for He alone is worthy of all this and none else besides Him