Col.4.14  Luke the beloved physician and Demas greet you.
2Tim.4.11  Luke alone is with me. Get Mark and bring him with you; for he is very useful in serving me.
Phlm.1.24  and so do Mark, Aristarchus, Demas, and Luke, my fellow workers.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.