This may take up to a few weeks, but usually 3 days to one week is good. It's always good to wait as long as you can before rubbing out the finish. Rubbing out the finish removes any little dust nibs trapped in the finish and also gives you a super smooth and fine surface. Apply some oil to the surface and sand with the grain. Periodically wipe off the surface to inspect the sheen.
Low areas appear as shiny spots.
Apply more oil and continue to sand until you achieve a uniform sheen. Apply a coat of high quality paste wax and buff it out after it has hazed over. I use Briwax. It is available in clear, light brown, dark brown, antique mahogany and other colors. If you are satisfied with the color after you are done, use the clear, if you wish to make the color a little darker, use one of the colored ones.