Is the stipulation valid if a female slave is stipulated to be a singer (mughanniyah)?

Chapter on Selling the Musarrah (Animal with milk retained in udder)

Al-Mughni

Book of Sales

Book 12 · Issue 13 · Bab 5

Open in Qurani

Primary text

The stipulation that a female slave is a singer is invalid because singing is condemned in Islamic law, rendering the stipulation invalid, similar to stipulating an act of fornication.