The repetition of an idea both in Hebrew poetry, as Ps. 8: 4, and in the gospels: e.g. Mark 7: 21; but when Matthew follows Mark, the superfluous words ‘from within’ are omitted by Matt. 15: 19, thus eliminating Mark's pleonasm.
Citation for pleonasm
Citation styles are based on the Chicago Manual of Style, 15th Ed., and the MLA Style Manual, 2nd Ed..
MLA
"pleonasm." In A Dictionary of the Bible. Ed. W. R. F. Browning. Oxford Biblical Studies Online. May 20, 2013. <http://www.oxfordbiblicalcstudies.com/article/opr/t94/e1496>.
Chicago
"pleonasm." In A Dictionary of the Bible. , edited by W. R. F. Browning. Oxford Biblical Studies Online, http://www.oxfordbiblicalcstudies.com/article/opr/t94/e1496 (accessed May 20, 2013).