Psalms 39:1

David : a son of Jesse of Judah; king of Israel,son of Jesse of Judah; king of Israel

Jeduthun : a Levite whose descendants returned from exile

Psalms 12:1--13:6

David : a son of Jesse of Judah; king of Israel,son of Jesse of Judah; king of Israel

sheminith : a musical term: an 8 stringed lyre or 'down an octave' (NASBfn)

Sheminith : a musical term: an 8 stringed lyre or 'down an octave' (NASBfn)