Blessing
The Emissary saying a marriage blessing
A blessing was a statement that was believed to bestow divine favor or wish one well.
The Yash-El had a night blessing that encouraged one to "Dream not of today." (TNG: "The Chase")
The Drayan scrolls also contained the blessing, "May this day find you at peace and leave you with hope." (VOY: "Innocence")
One of the duties (if requested) of the Emissary was to bestow a marriage blessing on newly married Bajorans. In 2372, Vedek Porta brought a couple to be blessed by Benjamin Sisko. When Kira Nerys stepped out of Sisko's office to get the couple, Jadzia Dax asked if he remembered the words. Sisko replied, "I hope so". He was able to carry out the action perfectly. Afterwards, Jadzia commented that his role wasn't that bad.
Contemplating being replaced by Akorem Laan, who believed he was the Emissary, Sisko enjoyed the prospect of shedding his religious role, as he would not have to give any blessings or do anything else of that nature again. This ultimately did not pan out.
Later, Onara asked Sisko to give the blessing at his daughter's ih'tanu ceremony. Sisko agreed. (DS9: "Accession")
Blessings
Bajoran
"Blessed be the Prophets." (DS9: "Strange Bedfellows")
Banean
"May the fates have mercy on you." (VOY: "Ex Post Facto")
Children of the Son
"May the blessings of the son be upon you." (TOS: "Bread and Circuses")
"Blessed be the son." (TOS: "Bread and Circuses")
Drayan
"May this day find you at peace and leave you with hope." (VOY: "Innocence")
Human
"Peace in your heart, fortune in your steps." (VOY: "Innocence")
- This phrase was in use among the Rubber Tree People, and attributed to the spirits of their people.
"May the wind be at our backs." (Star Trek III: The Search for Spock)
Yash-El
"Dream not of today." (TNG: "The Chase")
- Described as a "night blessing."
Vulcan
"Live long and prosper."
"Peace and long life."
"May your journey be free of incident." (Star Trek IV: The Voyage Home)
Other and of unknown origin
While impersonating Tuvok, a Vulcan, Mobar adopted the blessing "may the deities bless you" as part of his persona. (VOY: "Live Fast and Prosper")
"May the Great Bird of the Galaxy bless your planet." (TOS: "The Man Trap")