Hadith 2164
It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) forbade drinking water while standing. The narrator said: I asked Sayyiduna Anas (may Allah be pleased with him): And what about eating while standing? He replied: That is even worse.
Hadith 2165
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrated from the Noble Prophet (peace and blessings be upon him) that he saw a man drinking water while standing, so he said: "Vomit it out." The man asked: Why? He said: "Would you like to drink water with a cat?" He replied: No. He said: "A devil worse than a cat has drunk water with you."