Is there a rule about where to place "by + agent" in a passive sentence?

It normally comes after the verb but there are probably some exceptions. “The art was made by AI”, “the book was written by her friend”, etc. It would sound unnatural to say something like “by Tim the dinner was cooked” or “the dinner by Tim was cooked”

Henry and Jimmy demanding Bookie for money: \[JIMMY\] We will throw the bastard to the lions. \[HENRY\] Lions? I wasn't going near any lions! \[JIMMY\] Throw him over the moat. \[BOOKIE\] I will get the money! Then Henry starts narrating the below lines: \[HENRY\] They must really feed each other to the lions...‘cause he gave the money right up. What does "each other" mean ? I got banned here, cant able to post new one.

For clarity it will often be best to put + agent right after the verb, especially in a sentence with subordinate clauses. However, you may have other options : - He was born on a hot day in July, by Caesarian section Or - He was born by Caesarian section on a hot day in July Both are correct and in my view the difference between them is about emphasis and style.