As the new wine is found in the cluster; rather, as when new wine is found in a grape-bunch; i.e. as when even a single cluster of grapes is spied on a vine-stem, the vine-pruners say one to another, "Destroy not that stem, but spare it," so will God refrain from destroying those stocks in his vineyard, which give even a small promise of bearing good fruit.
Destroy it not. The words are thought to be those of a well-known vintage-song, which is perhaps alluded to in the heading (Altaschith) prefixed to Psalms 57:1-11; Psalms 58:1-11; Psalms 59:1-17. "Each of these psalms was probably sung to the air of this favourite song" (Cheyne).
A blessing is in it; i.e. "a boon from God" (comp. Isaiah 36:16; 2 Kings 5:15).