Three Pure Ones
Two passages of the "Qingjing Jing" are attributed to Laozi, with the honorific "Lord Lao" (, see Three Pure Ones). This has led many traditional sources to attribute authorship of the entire text to Laozi, so the text exists under a variety of honorific titles that link it to him. Scholars believe the received text dates from around the middle Tang Dynasty (618-907 CE).