伯劳，伯劳鸟。伯劳飞燕用以比喻人的别离。《元・王子一・误入桃源・第三折》：“端的个人生最苦是别离，倒做了伯劳飞燕各东西。”《元・王实甫・西厢记・第二本・第四折》：“他曲未终，我意转浓，争奈伯劳飞燕各西东，尽在不言中。”
英语 the shrike and the swallow flying in different directions--the couple has been torn apart against their own wishes
