Envoi

or envoy noun Etymology: Middle English envoye, from Middle French envoi, literally, message, from Old French envei, from enveier to send on one's way, from Vulgar Latin *inviare, from Latin in- + via way — more at way the usually explanatory or commendatory concluding remarks to a poem, essay, or book; especially a short final stanza of a ballad serving as a summary or dedication

Merriam-Webster's Collegiate Dictionary