Colossians 3:23-24

Amplified Bible

²³ Whatever 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, ²⁴ knowing [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.