Be sure to do what you should, for then you will enjoy the personal satisfaction of having done your work well, and you won’t need to compare yourself to anyone else. For we are each responsible for our own conduct. (Galatians 6:4-5)

Work hard, but not just to please your masters when they are watching. As slaves of Christ, do the will of God with all your heart. Work with enthusiasm, as though you were working for the Lord rather than for people. (Ephesians 6:6-7)

Work hard and cheerfully at whatever you do, as though you were working for the Lord rather than for people. Remember that the Lord will give you an inheritance as your reward, and the Master you are serving is Christ. (Colossians 3:23-24)

In the name of the Lord Jesus Christ, we appeal to such people—no, we command them: Settle down and get to work. Earn your own living. And I say to the rest of you, dear brothers and sisters, never get tired of doing good. (2 Thessalonians 3:12-13) 

If you keep yourself pure, you will be a utensil God can use for his purpose. Your life will be clean, and you will be ready for the Master to use you for every good work. (2 Timothy 2:21)

Don't you remember, dear brother and sisters, how hard we worked among you? Night and day we toiled to earn a living so that we would not be a burden to any of you as we preached God's Good News to you. (1 Thessalonians 2:9)