عَلَىٰٓ أَن نُّبَدِّلَ خَيْرًا مِّنْهُمْ وَمَا نَحْنُ بِمَسْبُوقِينَ Qur’an Al-Ma'arij (70:41)AAala an nubaddila khayran minhum wama nahnu bimasbooqeena
The implication is that it is not His will to replace "those who are bent on denying the truth" in this world, by believers, inasmuch as such a "replacement" would not be in accord with His design of multiform human existence, in which faith is always challenged and tested by unbelief, and vice versa.