Colossians 3:22-24

22Servants, in everything obey those who are your masters on earth, not only with external service, as those who merely please people, but with sincerity of heart because of your fear of the Lord.

23Whatever you do [whatever your task may be], work from the soul [that is, put in your very best effort], as [something done] for the Lord and not for men,

24knowing [with all certainty] that it is from the Lord [not from men] that you will receive the inheritance which is your [greatest] reward. It is the Lord Christ whom you [actually] serve.