For David had proposed, on that day, a reward to him who had struck the Jebusites and who had reached to the gutters of the rooftops, and who had taken 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 enter into the temple.
Other versions
King James Version
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. English Standard Version
And David said on that day, "Whoever would strike the Jebusites, let him get up the water shaft to attack 'the lame and the blind,' who are hated by David's soul." Therefore it is said, "The blind and the lame shall not come into the house."New International Version
On that day, David said, "Anyone who conquers the Jebusites will have to use the water shaft to reach those 'lame and blind' who are David's enemies. "That is why they say, "The 'blind and lame' will not enter the palace."