AN 11.502–981 — Untitled Discourses on the Eye, Etc.
“Mendicants, a cowherd with eleven factors can maintain and expand a herd of cattle. What eleven? It’s when a cowherd knows form … In the same way, a mendicant with eleven qualities can meditate observing impermanence in the eye … meditate observing letting go. …” Abbreviated Texts Beginning With Greed