Surah Fussilat, ayah 33

وَمَنۡ أَحۡسَنُ قَوۡلٗا مِّمَّن دَعَآ إِلَى ٱللَّهِ وَعَمِلَ صَٰلِحٗا وَقَالَ إِنَّنِي مِنَ ٱلۡمُسۡلِمِينَ ٣٣

Waman ahsanu qawlam mimman da'ā ilallāhi wa'amila sālihan waqāla innanī minal-muslimīn

And who is better in speech than one who invites to Allāh and does righteousness and says, "Indeed, I am of the Muslims."