Easton's Bible Dictionary (1897)
Destroy not, the title of Ps. 57, 58, 59, and 75. It was probably the name of some song to the melody of which these psalms were to be chanted.
Smith's Bible Dictionary (1863)
(destroy not), found in the introductory verse to Psalms 57,58,59,75. It was probably the beginning of some song or poem to the tune of which those psalms were to be chanted.