Surah Al-A'raf, ayah 2

7:2

كِتَٰبٌ أُنزِلَ إِلَيۡكَ فَلَا يَكُن فِي صَدۡرِكَ حَرَجٞ مِّنۡهُ لِتُنذِرَ بِهِۦ وَذِكۡرَىٰ لِلۡمُؤۡمِنِينَ ٢

Kitābun unzila ilayka falā yakun fī sadrika harajum minhu litundhira bihī wadhikrā lil-mu'minīn

[This is] a Book revealed to you, [O Muḥammad] - so let there not be in your breast distress therefrom - that you may warn thereby and as a reminder to the believers.