Below is a reference to the Beautiful Name of Allah in Quran or Hadith: 


Yusuf Ali (Surat An-Nisā' (The Women)  Surah #04 of 114, Verse #166 of 176)
But Allah beareth witness that what He hath sent unto thee He hath sent from His (own) knowledge, and the angels bear witness: But enough is Allah for a witness.