Four-character idioms that contain an allusive pair I am interested in finding some examples of four-character idioms that contain exactly a pair of allusions, different in source but similar in nature, that were often compiled by a specific literary author. Consider the following:




Idiom
Allusive pair
Source




成仁取義
孔曰成仁，孟曰取義
文天祥《自贊》


泣歧悲染
楊朱泣歧路，墨子悲染絲
阮籍《詠懷》


環肥燕瘦
短長肥瘦各有態，玉環飛燕誰敢憎
蘇東坡《孫莘老求墨妙亭詩》


沈魚落雁
毛嬙、麗姬，人之所美也，魚見之深入，鳥見之高飛
《莊子·齊物論》


顏筋柳骨
曼卿之筆，顏筋柳骨
范仲淹《祭石學士文》




Some have separate sources:




Idiom
Allusion 1
Allusion 2




懸樑刺股
（蘇秦）讀書欲睡，引錐自刺其股，血流至足（劉向《戰國策·秦策一》）
（孫敬）及至眠睡疲寢，以繩系頭懸屋梁（班固《漢書》）


閉月羞花
彷彿兮若輕雲之蔽月（曹植《洛神賦》）
秀色掩今古，荷花羞玉顏（李白《西施》）


斷袖分桃
不欲動賢，乃斷袖而起（《漢書·佞幸傳》）
食桃而甘，不盡，以其半啖君（韓非子《說難》）


結草銜環
顆見老人結草以亢杜回（《左氏傳·宣公》）
以白環四枚與寶（吳均《續齊諧記》）




Examples of what I do not consider as four-character idioms that contain an allusive pair:

撲朔迷離: the two are not distinct in terms of their source, as there is no further allusion in the《木蘭辭》couplet 雄兔腳撲朔，雌兔眼迷離.
南陽諸葛廬，西蜀子雲亭: the two are indeed two separate individuals in 劉禹錫《陋室銘》, but the expression is not idiomatic enough, let alone reducible into a four-character idiom.

I am sure there are more idioms like so, but I cannot think of a specific repertoire for this purpose (nor any more illustrative examples!) at the moment.
“文过饰非”： 《论语·子张》：“小人之过也，必文。”《庄子·盗跖》：“辩足以饰非。”