Here I found this illuminated codex with the image of David with the Harp.
Psalms of David. Third Volume of the Bible in Latin.
As the third volume Bible commissioned in Italy by King Matthias Corvinus of Hungary (1443–90) for his library.
The manuscripts were copied by Antonio Sinibaldi or his pupil Alessandro Verazzano, probably in 1489−90.
This volume is known as Corvinian Psalter. and is part of the Plutei Collection, which consists of the approximately 3,000 manuscripts and books from the private holdings of the Medici family.
What is interesting here is the stitched name in pearls (?) on his back and the gesture in adoration (?) of God.