增壹阿含經 13.7.p14

13.7.p14

Then, Venerable Subhūti rose from his seat and praised Pañcaśikha, “Good, Pañcaśikha! Your voice combines with your lute and your lute combines with your voice, so that there’s no difference between them. Indeed, the sound of your lute isn’t separate from the sound of your song, and the sound of your song isn’t separate from the sound of your lute. The two things merge together to become a sublime sound.”