Colossians 3:23-25

Whatever you do, work at it with all your heart, as working for the Lord, not for human masters, since you know that you will receive an inheritance from the Lord as a reward. It is the Lord Christ you are serving. Anyone who does wrong will be repaid for their wrongs, and there is no favoritism. 

since you know that you will receive an inheritance from the Lord 
Acts 20:32  "Now I commit you to God and to the word of his grace, which can build you up and give you an inheritance among all those who are sanctified."
Ephesians 1:13-14  And you also were included in Christ when you heard the message of truth, the gospel of your salvation. When you believed, you were marked in him with a seal, the promised Holy Spirit, who is a deposit guaranteeing our inheritance until the redemption of those who are God's possession--to the praise of his glory.
Matthew 25:34  "Then the King will say to those on his right, 'Come, you who are blessed by my Father; take your inheritance, the kingdom prepared for you since the creation of the world.' "
Colossians 1:12  ... and giving joyful thanks to the Father, who has qualified you to share in the inheritance of his holy people in the kingdom of light.
Hebrews 9:15  For this reason Christ is the mediator of a new covenant, that those who are called may receive the promised eternal inheritance--now that he has died as a ransom to set them free from the sins committed under the first covenant.
1 Peter 1:3-5  Praise be to the God and Father of our Lord Jesus Christ! In his great mercy he has given us new birth into a living hope through the resurrection of Jesus Christ from the dead, and into an inheritance that can never perish, spoil or fade. This inheritance is kept in heaven for you, who through faith are shielded by God's power until the coming of the salvation that is ready to be revealed in the last time.

as a reward 
Matthew 16:27  "For the Son of Man is going to come in his Father's glory with his angels, and then he will reward each person according to what they have done."

Anyone who does wrong will be repaid for their wrongs, and there is no favoritism 
Acts 10:34-35  Then Peter began to speak: "I now realize how true it is that God does not show favoritism but accepts from every nation the one who fears him and does what is right."

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