1 Sam 16:14: Now the Spirit of the Lord departed from Saul, and an evil spirit
from the Lord tormented him. 15 And Saul’s servants said to him, ”Behold now,
an evil spirit from God is tormenting you. 16 Let our lord now command your
servants, who are before you, to seek out a man who is skilful in playing the
lyre; and when the evil spirit from God is upon you, he will play it, and you
will be well.”… 19 Therefore Saul sent messengers to Jesse, and said, “Send me
David your son, who is with the sheep.” 20 … 23 And whenever the evil spirit
from God was upon Saul, David took the lyre and played it with his hand; so Saul
was refreshed, and was well, and the evil spirit departed from him.
Jesus' healing of the blind men on the road to Jerusalem also evokes another Davidic episode. David had pronounced a curse on the blind and lame upon his arrival into Jerusalem:
2 Samuel 5:6-9: And the king and his men went to Jerusalem against the Jebusites, the inhabitants of the land, who said to David, "You will not come in here, but the blind and the lame will ward you off"--thinking, "David cannot come in here." 7 Nevertheless David took the stronghold of Zion, that is, the city of David… Therefore it is said, "The blind and the lame shall not come into the house." 9 And David dwelt in the stronghold, and called it the city of David.
In an example of an "eschatological reversal” each of the Synoptics present the blind calling out to Jesus as the “Son of David” to “have mercy” on them (Matt. 20:30//Mark 10:47//Luke 18:38). As David cursed the blind as he was on his way to Jerusalem, Jesus heals them as he approaches the city. In so doing Jesus demonstrates his Davidic pedigree--he has the power to lift the curse.
 Meier, A Marginal Jew, 2:689; 3:495; Dunn, Jesus Remembered, 668.
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Complete outline (with links) of first two parts of "Jesus and the Restoration of the Kingdom" series