Final answer:
In Canto II of his poem, Dante invokes the muses and promises to repay the same service to them in return.
Step-by-step explanation:
In Canto II of his poem, Dante invokes the muses and promises to repay the same service to them in return. He mentions this in the following lines: "And in due time you shall repay the same service to me, For after we start we never lie by again." This means that Dante is seeking inspiration and guidance from the muses and vows to honor them by continuing to write and create poetic works.