昨日行苦旱，今日行苦雨。轣辘就泥泞，马首不能举。飘风复向东，飒飒响禾黍。洒我车中裳，黴色半沙土。有鸟鸣下田，垂垂湿其羽。旷野无丛林，何依得巢处？侧闻齐东西，三月酷天暑。但使居者乐，敢辞行者苦？