Surah Al-Anbiya, ayah 107

وَمَآ أَرۡسَلۡنَٰكَ إِلَّا رَحۡمَةٗ لِّلۡعَٰلَمِينَ ١٠٧

Wamā arsalnāka illā rahmatal lil-'ālamīn

And We have not sent you, [O Muḥammad], except as a mercy to the worlds.