This is Psalm 34 as set by Paul A Tate in Voices As One Vol 2.. The assembly will only manage the refrain and the cantors will do the tricky verses.
The sheet music can be purchased at WLP. The text is in their sample.
The refrain is
The angel of the Lord will rescue those who fear him.
He also sets an alternative antiphon – “Taste and see the goodness of the Lord.”