[Even] if you should strive for their guidance, [O Muhammad], indeed, Allah does not guide those He sends astray, and they will have no helpers.
The Saheeh International Quran Translation
إِن تَحْرِصْ عَلَىٰ هُدَىٰهُمْ فَإِنَّ ٱللَّهَ لَا يَهْدِى مَن يُضِلُّ وَمَا لَهُم مِّن نَّٰصِرِينَ[Even] if you should strive for their guidance, [O Muhammad], indeed, Allah does not guide those He sends astray, and they will have no helpers.