There's a fantastic scene in The Winter King that sheds light on some texts in Tanakh. It appears on pages 386-387 in the hardcover version. Here's the scene.
Arthur clasped me again, then called for his servant Hygwydd to help him tug off the suit of heavy scale armour. It came off over his head, leaving his short-cut hair tousled. "Would you wear it?" he asked me.
"Me?" I was astonished
"When the enemy attack," he said, "they'll expect to find me here and if I'm not here they'll suspect a trap." He smiled. "I'd ask Sagramor, but his face is somewhat more distinctive than yours, Lord Derfel. You'll have to cut off some of that long hair, though." My fair hair showing beneath the helmet's rim would be a sure sign I was not Arthur, "and maybe trim the beard a little," he added.
I took the armour from Hygwydd and was shocked by its weight. "I should be honoured," I said.
"It is heavy," he warned me. "You'll get hot, and you can't see to your sides when you're wearing the helmet so you'll need two good men to flank you." He sensed my hesitation. "Should I ask someone else to wear it?"
"No, no, Lord," I said. "I'll wear it."
"It'll mean danger," he warned me.
"I wasn't expecting a safe day, Lord," I answered.
"I shall leave you the banners," he said. "When Gorfyddyd comes he must be convinced that all his enemies are in one place. It will be a hard fight, Derfel."
"Galahad will bring help," I assured him.
He took my breastplate and shield, gave me his own brighter shield and white cloak, then turned and grasped Llamrei's bridle. "That," he told me once he had been helped into the saddle, "was the easy part of the day."When I first read this scene, it made me take a look at and question the famous scene in which Saul dresses David in his own armor to fight against Goliath. I got all excited and suggested to my husband that maybe Saul was insinuating to David that David should impersonate Saul and pretend that it is Saul himself who is fighting the giant. Then, when David refuses the armor, he is not only refusing the king's gift, but also refusing to impersonate Saul. 'I'll win on my own merit,' he seems to be saying, 'rather than pretend that I am you, and that you have won.'
However, I then reread the full scene in I Samuel 17. My potential reading doesn't work for several reasons: a) the king has publicly offered a reward for anyone who plans to fight Goliath, which suggests he does not intend to fight the giant himself b) although Saul dresses David in his armor, it is not clear that they are alone; this could be taking place in front of an audience and c) Saul wishes David to "Go with God" which suggests he is not angry with the youth for refusing to impersonate him. Also, the only other place that I remember offhand where a king has someone dressed in his clothing is Ahaseurus and Mordechai, and there the issue wasn't impersonation, but rather, honor. So it could be that Saul simply wished to honor David by dressing him in his armor rather than subtly trying to hint that David ought to impersonate him and allow him to take credit for the victory.
In support for my thesis, the questions remain: Why does Saul dress David in HIS OWN armor rather than simply asking David's brother or another person to give up their armor to the youth? Why does Saul HIMSELF dress the youth (remember, at this point the youth was simply a servant who played the lyre for him?) And after this battle, why does Saul take it so hard that the women sing that he has slain thousands, but David his tens of thousands (did he not himself assure David's reputation through allowing him to fight Goliath and then promoting him to his army?)
But if, from the very beginning, Saul had been trying to insinuate that David ought to let him have the glory, then of course it would fester that the youth had refused to permit him this, and had instead insisted on going out with his face clearly visible and recognizable to all...
The other text where this scene more aptly applies is the famous battle with King Ahab and King Jehosophat.
In this story, Ahab deflects attention from himself by having Jehosophat dress in royal robes. The enemy assumes Jehosophat is the King of Israel (when in reality he is the King of Judah). However, the scheme doesn't work because Ahab is killed by a random bowshot. It is, however, another example where disguise is used in battle to achieve a certain effect.