Mark 7:32

The Greek word describing this man’s speech impediment, mogilalos, is a rare one. It occurs only here in the New Testament and only in Isaiah 35:6 in the Septuagint version of the Old Testament. Its presence there is significant because Isaiah predicted that Messiah would loose the tongues of the dumb when He came (cf. Mark 7:37).

"Defective speech usually results from defective hearing, both physically and spiritually." [Note: Grassmick, p. 136.]