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

5:117

Yusuf Ali (Surat Al-Mā'idah (The Table Spread)  Surah #05 of 114, Verse #117 of 120)
"Never said I to them aught except what Thou didst command me to say, to wit, 'worship Allah, my Lord and your Lord'; and I was a witness over them whilst I dwelt amongst them; when Thou didst take me up Thou wast the Watcher over them, and Thou art a witness to all things.