I was asked to find gayatrī mantras to the god of healing Dhanvantari (but with a source). I'm able to find lots of mantras (including gayatrī mantras) on youtube and the internet but they don't give a source.

Ideally would be a gayatri mantra with a scriptural source (some ayurvedic text?) but acceptable would be some modern book collection of mantras etc. And even some shloka or non-gayatri mantra in a text asking for healing from Dhanvantari would also be acceptable.

Thanks,

Harry Spier