What follows is my provisional translation (in other words, not official or authorized; see here for more) of a Tablet from Baháʼuʼlláh published in Áthár-i-Qalam-i-Aʻlá, vol. 6, p. 323 (selection no. 317).
He is the Witness, the All-Informed
The Almighty testifieth that there is none other God besides Him, and that it is He Who hath emerged from the dayspring of power. He, verily, is hidden from the reaches of worldly knowledge. His name is recorded in the Tablet and mentioned in the Scriptures revealed aforetime by God, the Lord of the worlds. He exalteth whomsoever He willeth as a token of His grace; He is the Almighty, the Most Powerful. The noise and tumult of men are powerless to deter Him. He hath appeared and made manifest that which He hath desired with a sovereignty that the powers of earth and heaven are powerless to resist.
We, verily, have heard thy call, and have made mention of thee in this perspicuous Tablet. Say: Praise be unto Thee, O my God, and glory be unto Thee, O my Desire, for having enabled me to recognize the One Who is the Dayspring of Thy Revelation, the Dawning-Place of Thy commandments, and the Source of Thy laws. I beseech Thee by Thy loved ones—who have given their all to promote Thy Cause, and whom the changes and chances of this world can never withhold from drawing nigh unto Thy Most Great Name—to enable me to serve Thy cause and to be steadfast in Thy love. Potent art Thou to do what pleaseth Thee. No God is there but Thee, the Ever-Forgiving, the Most Compassionate.
A typed version of the complete Arabic text of this tablet appears below (vocalization mine).