Source text
text (sometimes oral) from which information or ideas are derived. In translation, a source text is the original text that is to be translated into another language From Wikipedia, the free encyclopedia
A source text[1][2] is a piece of work (usually writing, sometimes speech) where information or ideas come from. In translation, a source text is the original text that is to be translated into another language.
In the study of history, people talk about primary (firsthand), secondary (secondhand) and tertiary (thirdhand) sources.
References
Wikiwand - on
Seamless Wikipedia browsing. On steroids.