Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
Instructing, occurs in the title of thirteen Psalms (Ps. 32, 42, 44, etc.). It denotes a song enforcing some lesson of wisdom or piety, a didactic song. In Ps. 47:7 it is rendered, Authorized Version, "with understanding;" Revised Version, marg., "in a skilful psalm."