whence 
/ˈwɛns/ adverb
/ˈwɛns/ adverb old-fashioned + literary : from where
▪ They returned to the land whence they came. ▪ Whence the source of this tradition? [=where does this tradition come from?] — often + from ▪ They returned to the land from whence they came.
▪ They returned to the land whence they came. ▪ Whence the source of this tradition? [=where does this tradition come from?] — often + from ▪ They returned to the land from whence they came.
