As to the construction, the subject must either be supplied from Psalm 34:2, or it must be general. The LXX. and Vulg. avoid the difficulty by changing to the second person.
and their faces were not ashamed; having what they prayed and looked for, and what they hoped and believed they should have; namely, deliverance and salvation, and so peace and pleasure.
(l) "et confluunt", Junius & Tremellius, Michaelis; "et instar fluvii irruerint", Piscator, Amama; "et confluxerunt", Gejerus.