'Instrument' in the Bible

For the choir director; on a stringed instrument. A Psalm of David.Hear my cry, O God;Give heed to my prayer.

Behold, you are to them like a sensual song by one who has a beautiful voice and plays well on an instrument; for they hear your words but they do not practice them.

But the Lord said to him, “Go, for he is a chosen instrument of Mine, to bear My name before the Gentiles and kings and the sons of Israel;