Parum sibi consulit aegrotus qui medicum heredem facit.

The proverb means: A patient who makes the doctor his heir is essentially signaling that he expects death, not recovery.
Therefore, it implies: Such a patient is not likely to recover, because making a will for the doctor suggests the person believes they won’t live long.
🌍 Origin:
It originates from Latin Roman moral/proverb tradition (short sententious sayings), where health and fate were often discussed through warnings and ethical maxims.
The Latin wording is:
“Parum sibi consulit aegrotus qui medicum heredem facit .”
(“does little for himself… who makes the doctor his heir”).
✍️ Author: Publius Syrus (1st century BC),
a Roman author known for moral sayings/epigrams (sententiae) that later became proverbial.