Colossians 3:23

do it heartily, as to the Lord, and not to men;

Romans 12:11

not slothful in business: fervent in spirit: serving the Lord.

Matthew 6:33

But seek first the kingdom of God and his righteousness, and all these shall be superadded unto you.

John 4:34

Jesus saith unto them, My food is to do the will of Him that sent me, and to finish his work.

John 9:4

I must perform the works of Him that sent me, while it is day: the night is coming, when no man can work.

Acts 20:25-31

And now behold I know that ye all, among whom I have gone preaching the kingdom of God, shall see my face no more.

Romans 15:18-20

For I shall not go about to speak of any thing, but what Christ hath wrought by me, (to gain the obedience of the Gentiles,) both in word and deed:

1 Corinthians 9:24

Know ye not, that those, who run in a race, do all indeed run, but one only receiveth the prize? So run that ye may obtain.

1 Corinthians 9:26

I therefore so run, not as unobserved: I so fight, not as one that beateth the air:

1 Corinthians 15:10

But by the grace of God I am what I am: and his favor to me was not in vain; but I laboured more abundantly than they all; yet not I, but the grace of God that was with me.

1 Corinthians 16:10

If Timothy should come, see that he be with you without fear: for he is employed in the work of the Lord, as I also am.

Ephesians 5:16

redeeming the time, because the days are evil.

2 Peter 1:12-15

Wherefore I will not neglect to put you always in mind of these things, though ye know them, and are established in the present truth.

Treasury of Scripture Knowledge

Summary

Whatsoever thy hand findeth to do, do it with thy might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, whither thou goest.

Bible References

Thy hand

Matthew 6:33
But seek first the kingdom of God and his righteousness, and all these shall be superadded unto you.
John 4:34
Jesus saith unto them, My food is to do the will of Him that sent me, and to finish his work.
Romans 12:11
not slothful in business: fervent in spirit: serving the Lord.
Romans 15:18
For I shall not go about to speak of any thing, but what Christ hath wrought by me, (to gain the obedience of the Gentiles,) both in word and deed:
1 Corinthians 9:24
Know ye not, that those, who run in a race, do all indeed run, but one only receiveth the prize? So run that ye may obtain.
1 Corinthians 15:10
But by the grace of God I am what I am: and his favor to me was not in vain; but I laboured more abundantly than they all; yet not I, but the grace of God that was with me.
1 Corinthians 16:10
If Timothy should come, see that he be with you without fear: for he is employed in the work of the Lord, as I also am.
Ephesians 5:16
redeeming the time, because the days are evil.
Colossians 3:23
do it heartily, as to the Lord, and not to men;
2 Peter 1:12
Wherefore I will not neglect to put you always in mind of these things, though ye know them, and are established in the present truth.

For

John 9:4
I must perform the works of Him that sent me, while it is day: the night is coming, when no man can work.
Acts 20:25
And now behold I know that ye all, among whom I have gone preaching the kingdom of God, shall see my face no more.