Kokoro, by Natsume Soseki (paragraph #1071)

「あんまり仰山な事は止して下さい」

translation

"Please stop being too pretentious."

kanji (pronunciations & definitions)
仰山: a lot (ぎょうさん), a lot (ぎょーさん), plenty, plenty, abundant : thing (こと), thing (こん), matter, matter, incident : below (した), down, under, younger (e.g. daughter), bottom

Next paragraph