وَقَعُوا فِى وَادِى تُخُيِّبَ

, (Ks, S, A, K, but in the last وَقَعَ,) and تُخَيِّبَ, (A, K,) the last word being imperfectly decl. [in each of these instances], (Ks, S, A, K,) meaning فِى البَاطِلِ [i. e. They fell into that which was vain, unreal, nought, futile, or the like, and consequently, into disappointment], (Ks, S, K,) or فى بَاطِلٍ [into a state of things that was vain, &c.]. (A.)