[This is] a Book revealed to you, [O Muhammad] - so let there not be in your breast distress therefrom - that you may warn thereby and as a reminder to the believers.
The Saheeh International Quran Translation
كِتَٰبٌ أُنزِلَ إِلَيْكَ فَلَا يَكُن فِى صَدْرِكَ حَرَجٌ مِّنْهُ لِتُنذِرَ بِهِۦ وَذِكْرَىٰ لِلْمُؤْمِنِينَ[This is] a Book revealed to you, [O Muhammad] - so let there not be in your breast distress therefrom - that you may warn thereby and as a reminder to the believers.