'Eight stringed' in the Bible

For you will bless the righteous. Yahweh, you will surround him with favor as with a shield. For the Chief Musician; on stringed instruments, upon the eight-stringed lyre. A Psalm by David.

For Yahweh is righteous. He loves righteousness. The upright shall see his face. For the Chief Musician; upon an eight-stringed lyre. A Psalm of David.