To Allah belong the Most Beautiful Names, so call on Him by them and abandon those who desecrate His Names. They will be repaid for what they did. (Qur'an, 7:180)
Say: 'Call on Allah or call on the All-Merciful, whichever you call upon, the Most Beautiful Names are His.' Do not be too loud in your prayer or too quiet in it, but try to find a way between the two. (Qur'an, 17:110)
Allah, there is no god but Him. The Most Beautiful Names are His. (Qur'an, 20:8)
He is Allah—the Creator, the Maker, the Giver of Form. To Him belong the Most Beautiful Names. Everything in the heavens and earth glorifies Him. He is the Almighty, the All-Wise. (Qur'an, 59:24)