Allah states that out of their disbelief and stubbornness, the idolators asked why is not a miracle sent down to the Messenger from his Lord, just like the earlier Messengers For instance, the disbelievers were being stubborn when they asked the Prophet to turn As-Safa into gold, to remove the mountains from around them, and to replace them with green fields and rivers. Allah said,

[وَمَا مَنَعَنَآ أَن نُّرْسِلَ بِالاٌّيَـتِ إِلاَّ أَن كَذَّبَ بِهَا الاٌّوَّلُونَ]

(And nothing stops Us from sending the Ayat but that the people of old denied them.)[17:59] Allah said here,

[إِنَّمَآ أَنتَ مُنذِرُ]

(You are only a warner), and your duty is only to convey Allah's Message which He has ordered you,

[لَّيْسَ عَلَيْكَ هُدَاهُمْ وَلَـكِنَّ اللَّهَ يَهْدِى مَن يَشَآءُ]

(Not upon you is their guidance, but Allah guides whom He wills.)[2:272] Allah said;

[وَلِكُلِّ قَوْمٍ هَادٍ]

(And to every people there is a guide.) meaning that for every people there has been a caller, according to Ibn `Abbas and as narrated from him by Ali bin Abi Talhah. Allah said in a similar Ayah, a

[وَإِن مِّنْ أُمَّةٍ إِلاَّ خَلاَ فِيهَا نَذِيرٌ]

(And there never was a nation but a warner had passed among them.)[35:24] Similar has reported from Qatadah and `Abdur-Rahman bin Zayd.

[اللَّهُ يَعْلَمُ مَا تَحْمِلُ كُلُّ أُنثَى وَمَا تَغِيضُ الاٌّرْحَامُ وَمَا تَزْدَادُ وَكُلُّ شَىْءٍ عِندَهُ بِمِقْدَارٍ - عَـلِمُ الْغَيْبِ وَالشَّهَـدَةِ الْكَبِيرُ الْمُتَعَالِ ]

(8. Allah knows what every female bears, and by how much the wombs fall short (of their time or number) or exceed. Everything with Him is in (due) proportion.) (9. All-Knower of the unseen and the seen, the Most Great, the Most High.)