What does 2 Samuel 5:8 mean?

And David said on that day, Whosoever smiteth the Jebusites, let him get up to the watercourse, and smite the lame and the blind, that are hated of David’s soul. Wherefore they say, There are the blind and the lame; he cannot come into the house.

And David said on that day, Whosoever getteth up to the gutter, and smiteth the Jebusites, and the lame and the blind, that are hated of David’s soul, he shall be chief and captain. Wherefore they said, The blind and the lame shall not come into the house.

And David said on that day, Whosoever smiteth the Jebusites, let him get up to the watercourse, and smite the lame and the blind, that are hated of David’s soul. Wherefore they say, There are the blind and the lame; he cannot come into the house.

And that day David said, Whoever makes an attack on the Jebusites, let him go up by the water-pipe, and put to death all the blind and feeble-footed who are hated by David. And this is why they say, The blind and feeble-footed may not come into the house.

And David saith on that day, `Any one smiting the Jebusite, (let him go up by the watercourse), and the lame and the blind--the hated of David's soul,' --because the blind and lame say, `He doth not come into the house.'

For David had offered that day a reward to whosoever should strike the Jebusites and get up to the gutters of the tops of the houses, and take away the blind and the lame that hated the soul of David: therefore it is said in the proverb: The blind and the lame shall not come into the temple.

And David said on that day, Whoever smites the Jebusites and gets up to the watercourse, and the lame and the blind hated of David's soul...! Therefore they say, The blind and the lame shall not come into the house.