Abigail and Nabal's Wall in Midrash Shmuel on First Samuel 25

"So may God do to the enemies of David, and more also, [if I leave of all that pertain to him until the morning light so much as] one that pisseth against the wall" (1 Samuel 25:22). Rabbi Yehudah and Rabbi Nechemyah: Rabbi Yehudah says, grandchildren are like children; and Rabbi Nechemyah said, even the dog. "But one of the young men told Abigail, Nabal's wife, saying... and he railed at them" (1 Samuel 25:14). What is "and he railed at them"? He chirped at them with words. "They were a wall unto us both by night and by day" (1 Samuel 25:16). Rabbi Chananyah and Rabbi Yonatan, both of them say: from here we find that the righteous are called a wall. "And it was so, as she rode on the ass... [that] she met them" (1 Samuel 25:20). Her leg was uncovered, and they walked by her light; her leg was uncovered, and they were all honored.