2 Kings 8:15

And it came to pass on the morrow, that he took a thick cloth, and dipped it in water, and spread it on his face, so that he died: and Hazael reigned in his stead.

Took a thick cloth ... х hamakbeer (H4346)] - the coarse (hair) cloth used as a coverlet. In the East this article of bed furniture is generally a thick quilt of wool or cotton, so that, with its great weight when steeped in water, it would be a fit instrument for accomplishing the murderous purpose, without leaving any marks of violence. But it has been supposed by many (among whom are J.D. Michaelis and Harmer) doubtful that Hazael purposely murdered the king. It is common for Eastern people sleep with their faces covered with a mosquito net, and in some cases of fever they damp the bed clothes. Hazael, aware of those chilling remedies being usually resorted to, might have, with an honest intention, spread a refreshing cover over him; or Ben-hadad, encouraged by the report of Elisha's answer, might do it himself, and a sudden chill being produced, the act might have become unexpectedly fatal. The rapid occurrence of the king's death and immediate burial were favourable to Hazael's instant elevation to the throne.