A physician friend pointed out to me the Rambam's "physician's oath" (it doesn't look like an oath per se, but that's what it's called), which begins (in English):
The eternal providence has appointed me to watch over the life and health of Thy creatures. May the love for my art actuate me at all time; may neither avarice nor miserliness, nor thirst for glory or for a great reputation engage my mind; for the enemies of truth and philanthropy could easily deceive me and make me forgetful of my lofty aim of doing good to Thy children. [...] Full text at Wikipedia.
The lone source on that page leads to an article with non-specific citations, including the Guide for the Perplexed. But the Guide is a big document. Further, some say that this is a later text, not from the Rambam at all.
Was this text written by the Rambam? If so, where can I find it in its original form?