Lisburn Distillery 0-3 Linfield
The Blues stayed on course for the Premiership title after a comfortable victory at New Grosvenor.
Michael Carvill's rising shot put the leaders ahead on 12 minutes while Robert Garrett and Michael Gault went close for Linfield in the first half.
Striker Peter Thompson doubled the lead after 65 minutes with a fine finish at the back post.
Mark McAllister hit the Whites woodwork before he set up Daryl Fordyce to tap in with seven minutes left.