epibole

from The Century Dictionary.

• noun In rhetoric, a figure by which successive clauses begin with the same word or words or with a word or phrase of similar meaning; epanaphora.
• noun In embryology, same as epiboly.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The irregular recurrence of the same expression within a verse or successive verses of scripture. Essentially random repetition.