A very strange story in 2 Sam 5 about David's capture of Jerusalem.
6 (K) Now the king and his men went to (L) Jerusalem against the Jebusites, the inhabitants of the land, and they said to David, "You shall not come in here, but the blind and lame will turn you away"; thinking, "David cannot enter here."
7 Nevertheless, David captured the stronghold of Zion, that is (M) the city of David.
8 David said on that day, "Whoever would strike the Jebusites, let him reach the lame and the blind, who are hated by David's soul, through the water tunnel." Therefore they say, "The blind or the lame shall not come into the House."
Now why would David hate cripples and the blind?
Note the comment a little later in the story regarding Mephibosheth at 9:13
13 And Mephibosheth is dwelling in Jerusalem, for at the table of the king he is eating continually, though he [is] lame of his two feet.
It was earlier (4:4) explained that Mephib. was lamed so why repeat it here?
Note also that the Deuteronomist anachronisticly uses the story as an etiological explanation for why blind and lame cannot enter the "House"/Temple.
Does the story play on different levels? Do the "blind and lame" represent those alienated from Yahweh who find favor? This is a recurring motif throughout the Bible.