"Thou hast had at no time any peer or partner."

"... We testify, O my God, that Thou art God, and that there is no God besides Thee. From eternity Thou hast existed with none to equal or rival Thee, and wilt abide for ever the same. I beseech Thee, by the eyes which see Thee stablished upon the throne of unity and the seat of oneness, to aid all them that love Thee by Thy Most Great Name, and to lift them up into such heights that they will testify with their own beings and with their tongues that Thou art God alone, the Incomparable, the One, the Ever-Abiding. Thou hast had at no time any peer or partner. Thou, in truth, art the All-Glorious, the Almighty, Whose help is implored by all men."

-Bahá'u'lláh,  Prayers and Meditations by Bahá’u’lláh, XXVII, pp. 31-32