Colossians 3:23

(New International Version)
Whatever you do, work at it with all your heart, as working for the Lord, not for men,

(The Message)
Servants, do what you're told by your earthly masters. And don't just do the minimum that will get you by. Do your best. Work from the heart for your real Master, for God, confident that you'll get paid in full when you come into your inheritance. Keep in mind always that the ultimate Master you're serving is Christ. The sullen servant who does shoddy work will be held responsible. Being a follower of Jesus doesn't cover up bad work.

(Amplified Bible)
Whatever may be your task, work at it heartily (from the soul), as [something done] for the Lord and not for men,

(New Living Translation)
Work willingly at whatever you do, as though you were working for the Lord rather than for people.

(King James Version)
And whatsoever ye do, do it heartily, as to the Lord, and not unto men;

(New King James Version)
And whatever you do, do it heartily, as to the Lord and not to men,

(Holman Christian Standard Bible)
Whatever you do, do it enthusiastically, as something done for the Lord and not for men,

(New International Reader's Version)
Work at everything you do with all your heart. Work as if you were working for the Lord, not for human masters.

(Contemporary English Version)
Do your work willingly, as though you were serving the Lord himself, and not just your earthly master.