The name is menacing, but the meaning is more straightforward than it seems. Epanalepsis is simply repeating the same word or words at the beginning and ending of a phrase. The most famous example is as follows:
The king is dead; long live the king.
Why would someone use epanalepsis? Now days, it’s more rare (and sounds a bit unnatural), but this arrangement, while raising the formality, does provide a special emphasis to the repeated word or words.
My beloved is mine, and I belong to my beloved.
Let’s see some examples you have found or made up.