Surah As-Saffah (Those Angels Lines up in Ranks), Verse 52

یَّقُوْلُ ءَاِنَّكَ لَمِنَ الْمُصَدِّقِیْنَ ۟

Yaqoolu 'a innaka laminal musaddiqeen

“"Who used to say, 'what! art thou amongst those who bear witness to the Truth (of the Message)?”

Quran 37:52 (Yusuf Ali Translation)