his/her mouth
Un homme n'as-t-il plus le droit d'ouvrir sa bouche dans cette cité ?
Is a man no longer allowed to speak his mind in this city?
— Agora (2009)
Il y a quelque chose dans sa bouche.
There is something in his mouth.
Je veux l'entendre de sa bouche.
I want to hear it from his mouth.
Avez-vous reçu de tels ordres de sa bouche ?
Did you receive such orders from him?