On the day of the attack, David said to his troops, “I hate those ‘lame’ and ‘blind’ Jebusites. Whoever attacks them should strike by going into the city through the water tunnel.” That is the origin of the saying, “The blind and the lame may not enter the house.”
“Go down the rows of the vineyards and destroy the grapevines, leaving a scattered few alive. Strip the branches from the vines, for these people do not belong to the Lord.