I beseech Thee, by the potency of Thy will and the compelling power of Thy purpose, to make of what Thou didst reveal unto me in my sleep the surest foundation for the mansions of Thy love that are within the hearts of Thy loved ones, and the best instrument for the revelation of the tokens of Thy grace and Thy loving-kindness. Do Thou ordain for me through Thy most exalted Pen, O my Lord, the good of this world and of the next. I testify that within Thy grasp are held the reins of all things. Thou changest them as Thou pleasest. No God is there save Thee, the Strong, the Faithful. Thou art He Who changeth through His bidding abasement into glory, and weakness into strength, and powerlessness into might, and fear into calm, and doubt into certainty. No God is there but Thee, the Mighty, the Beneficent.

Bahá’u’lláh, Prayers and Meditations by Bahá’u’lláh, p. 249

Prayer to be said after disturbed dreams: It hath been decreed that, if anyone should have a troubled dream and should thereby be grieved and saddened, he may recite this blessed verse:  "O Thou by whose Name the sea of joy moveth and the fragrance of happiness is wafted. I ask Thee to show me from the wonders of Thy favour, that which shall brighten my eyes and shall gladden my heart. Verily, Thou art the Giver, the Generous."  Even in the case of dreams which have not been troubled, it is agreeable for this verse to be recited.

Bahá’u’lláh, provisional translation of a Tablet to Muhammad Karim-i-Attar