فصّلت — Fussilat Ayat 33
وَمَنْ اَحْسَنُ قَوْلًا مِّمَّنْ دَعَآ اِلَى اللّٰهِ وَعَمِلَ صَالِحًا وَّقَالَ اِنَّنِيْ مِنَ الْمُسْلِمِيْنَ
Wa man aḥsanu qaulam mimman da‘ā ilallāhi wa ‘amila ṣāliḥaw wa qāla innanī minal-muslimīn(a).
"And who is better in speech than one who invites to Allah and does righteousness and says, "Indeed, I am of the Muslims.""