epanadiplosis

from The Collaborative International Dictionary of English v.0.48

Epanadiplosis \Ep*an`a*di*plo"sis\, n. [L., fr. Gr. ?; 'epi` + ?
   to make double.] (Rhet.)
   A figure by which the same word is used both at the beginning
   and at the end of a sentence; as, "Rejoice in the Lord
   always: and again I say, Rejoice." --Phil. iv. 4.
   [1913 Webster]