Ashtangasamgraha 23.26

23.26

When a wholesome food has become disliked through constancy or lack of taste,

One should make it pleasing again by various methods of preparation.

And having fomented the jaws when stiff or displaced, one should press them with both hands and restore them to their proper position.

When the mouth is open, one should elevate the chin;

And when the mouth is closed, one should depress it.