al-Ahad (The One)
“Say: He is Allaah, al-Ahad.”
Sooratul-Ikhlaas [112:1]
Reference:
Exemplary principles concerning the beautiful names of Allaah.
Shaykh Muhammad Ibn Saalih Al-‘Uthaymeen D. 1421 H
Translated by Moosaa Richardson
Revised 2nd Edition with additional commentary.