from whence
The extra from.
Whence already means from where. From whence is old and common. Prefer whence or from where.
Examples
UseI know whence the rumor came.
UseI know from where the rumor came.
AvoidI know from whence the rumor came.
The extra from.
Whence already means from where. From whence is old and common. Prefer whence or from where.
UseI know whence the rumor came.
UseI know from where the rumor came.
AvoidI know from whence the rumor came.