Consecutive sentences or verses with the same construction, so that the reader compares what changes from one to the next.
In Inferno
but when you return to the sweet world, I beg that you bring me to the memory of others: I do not tell you more and I do not answer you more.
The two final clauses have the same construction: "I do not tell you more" and "I do not answer you more". The parallelism closes the conversation with two identical negations and gives the farewell a dry and final tone.