2Tim.2.21  If any one purifies himself from what is ignoble, then he will be a vessel for noble use, consecrated and useful to the master of the house, ready for any good work.
2Tim.4.11  Luke alone is with me. Get Mark and bring him with you; for he is very useful in serving me.
Phlm.1.11  (Formerly he was useless to you, but now he is indeed useful to you and to me.)
Heb.6.7  For land which has drunk the rain that often falls upon it, and brings forth vegetation useful to those for whose sake it is cultivated, receives a blessing from God.