Strong’s Greek
G4858 — sumphonia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
συμφωνία
sumphonia — pronounced soom-fo-nee'-ah
from 4859; unison of sound ("symphony"), i.e. a concert of instruments (harmonious note):--music. see GREEK for 4859
1 occurrence in the KJV.
Luke 15:25
Now his elder son was in the field: and as he came and drew nigh to the house, he heard musick and dancing.