Why are my Maori units automatically healing?

A few times in this game a Maori unit has automatically healed itself. This one was down in the red, it just got attacked, then at the start of the next turn it was fully healed.
I didn't promote it, I did nothing at all, it's just magically healed.
Any idea why? I can find nothing about this online. I haven't played as the Maori for months but I don't remember this happening before.
Best Answer
Did you make a P?? I can't see one, but I don't play, so maybe I'm just blind. And I'm just working off what the Wiki gives me.
Here's the wiki's article on P?. They give healing to the culture's units if they end on it.
And here's the wiki's article on Healing, if it's not a P?.
Pictures about "Why are my Maori units automatically healing?"



Maori Ways of Healing by Donna Kerridge
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: RODNAE Productions, RODNAE Productions, RODNAE Productions, RODNAE Productions