[If] one digs a pit in a private domain and opens it into a public domain, or [if he digs it] in a public domain and opens it into a private domain, [or if he digs it] in a private domain and opens it into another private domain, he is liable.  [If] one digs a pit in a public domain, and a bull or a donkey falls into it and dies, he is liable. Whether one digs a pit, a trench, a cave, quad-rangular pits, or wedge-like ditches, he is liable. If so, why is pit stated? [To teach us that] just as a pit is deep enough to cause death —- [being] ten handbreadths, so is everything that is deep enough to bring about death —- [being] ten handbreadths. [If] they are less than ten handbreadths [deep], and a bull or a donkey fell into it and died, he is exempt; if it is injured, he is liable.