Lit., thou dost release. The word is often used of manumitting or setting free on payment of ransom; and as Simeon uses the word for bond-servant, it is evident that his death is conceived by him under the figure of enfranchisement from service. Godet's “release of a sentinel from duty” is fanciful.
O Lord (δέσποτα)
See on 2Pe 2:1.
In peace
Rev. properly puts this in its emphatic position at the end of the sentence.