Garudapurana 1.175.15

1.175.15

dadyātsuśītalaṃ vāri tṛṭchardijvaradāhanut /
bilvādipa pañcamūlasya kvāthaḥ syādvātike jvare //

one should give thoroughly cooled water, which dispels thirst, vomiting, fever, and burning sensation. / A decoction of the bilva group of five roots is for fever born of vāta;