The poem "A Warning to the Worldly" ("Jing Shi"), which appears in the Chongwen-era Jin Ping Mei, the Rongyu Hall Edition of the Water Margin (Rongyutang Ben Shuihu Zhuan), Supplement to the Journey of the West (Xiyou Bu), and other Ming dynasty writings, is arguably one of Daoism's most widely enjoyed poems. Despite its popularity, this poem's authorship and date of first publication remain unclear, and moreover its fundamental meaning remains shrouded behind the obscure, coded, and little-understood language of Daoist internal alchemy. In order to trace this poem's origins, this paper focuses on its earliest extant version, which is contained in Wang Yuanhui's Annotated Classic of Eternal Clarity and Tranquility Spoken by Taishang Laojun (Taishang Laojun Shuo Chang Qingjing Jing Zhu) and introduces the possibility of the poem having been authored by the Song dynasty poet and Daoist priestess Cao Wenyi (1040-1115). Subsequently, this paper embarks upon a character-by-character exegesis of the internal alchemy instructions hidden in "A Warning to the Worldly," demonstrating that its author employed triple entendres to hide an alchemical formula behind the poem's sexual wordplay.