Before he left, he gave a valediction to his family.
在走之前，他向亲人说了告别词。
英语百科
Valediction
A valediction (derivation from Latin vale dicere, "to say farewell"), or complimentary close in American English, is an expression used to say farewell, especially a word or phrase used to end a letter or message, or the act of saying parting words whether brief or extensive.