Did Lincoln say these words:

[RJNorton]

David, I second Steve. I have researched this quote before and never found a legitimate source.

The closest I can think of is as follows:

"Leave nothing for tomorrow which can be done to-day. Never let your correspondence fall behind. Whatever piece of business you have in hand, before stopping, do all the labor pertaining to it which can then be done."

SOURCE: The Collected Works of Abraham Lincoln edited by Roy P. Basler, Volume II, "Notes for a Law Lecture" (July 1, 1850?), p. 81.