Blessing
A blessing was a statement that was believed to bestow divine favor or wished one well.

The Yash-El had a night blessing that encouraged one to "Dream not of today." ()

The Drayan scrolls also contained the blessing, "May this day find you at peace and leave you with hope." ()

One of the duties (if requested) of the  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. ()

Blessings

Bajoran 
"Blessed be the Prophets." ()

Banean 
"May the fates have mercy on you." ()

Children of the Son 
"May the blessings of the son be upon you." ()

"Blessed be the son." ()

Drayan 
"May this day find you at peace and leave you with hope." ()

Human 
"Peace in your heart, fortune in your steps." ()
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." ()

Yash-El 
"Dream not of today." ()
Described as a "night blessing."

Vulcan 
"Live long and prosper."

"Peace and long life."

"May your journey be free of incident." ()

Other and of unknown origin 
While impersonating Tuvok, a Vulcan, Mobar adopted the blessing "may the deities bless you" as part of his persona. ()

"May the Great Bird of the Galaxy bless your planet." ()

External link 
 
Mythology