In "Yakushikyo Sutra," there is a description that 'evil elephants, lions, tigers, wolves, bears, poisonous snakes, scorpions, centipedes, mosquitoes, gnats, or other frightful things' would be cleared by praying for Yakushi Nyorai.
『薬師経』に「悪象・師子・虎狼・熊羆・毒蛇・悪蝎・蜈蚣・蚰蜒、如是等怖」も薬師如来に祈れば取り除かれるであろうと説いている。