لَّيْسَ عَلَيْكَ هُدَاهُمْ وَلَـكِنَّ اللّهَ يَهْدِي مَن يَشَاء وَمَا تُنفِقُواْ مِنْ خَيْرٍ فَلأنفُسِكُمْ وَمَا تُنفِقُونَ إِلاَّ ابْتِغَاء وَجْهِ اللّهِ وَمَا تُنفِقُواْ مِنْ خَيْرٍ يُوَفَّ إِلَيْكُمْ وَأَنتُمْ لاَ تُظْلَمُونَ
[2:272]
To make them walk in the right way is not incumbent on you, but Allah guides aright whom He pleases; and whatever good thing you spend, it is to your own good; and you do not spend but to seek Allah's pleasure; and whatever good things you spend shall be paid back to you in full, and you shall not be wronged.
It is not required of thee (O Messenger), to set them on the right path, but Allah sets on the right path whom He pleaseth. Whatever of good ye give benefits your own souls, and ye shall only do so seeking the "Face" of Allah. Whatever good ye give, shall be rendered back to you, and ye shall not Be dealt with unjustly.
The guiding of them is not thy duty (O Muhammad), but Allah guideth whom He will. And whatsoever good thing ye spend, it is for yourselves, when ye spend not save in search of Allah's Countenance; and whatsoever good thing ye spend, it will be repaid to you in full, and ye will not be wronged.