And it came to pass, when Benhadad heard this message, as he was drinking, he and the kings in the pavilions, that he said unto his servants, Set yourselves in array. And they set themselves in array against the city. In the pavilions - This word comes from papilio, a butterfly, because tents, when pitched or spread out, resembled such animals; partly because of the mode of their expansion, and partly because of the manner in which they were painted.
Set yourselves in array - The original word, שימו simu, which we translate by this long periphrasis, is probably a military term for Begin the attack, Invest the city, Every man to his post, or some such like expression.