Al-Hijr - 15:89

وَقُلْ إِنِّي أَنَا النَّذِيرُ الْمُبِينُ
[15:89]
And say: Surely I am the plain warner.
And say: "I am indeed he that warneth openly and without ambiguity,"-
And say: Lo! I, even I, am a plain warner,