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