Matthew 6:34

Be not then anxious about the morrow; for the morrow will be anxious about itself. Sufficient for the day is the evil thereof.

Romans 12:11-12

Be not backward in zeal; be fervent in spirit; serving the Lord.

Philippians 4:4-5

Rejoice in the Lord always; again I will say it, rejoice.

Treasury of Scripture Knowledge

Summary

Wherefore I perceive that there is nothing better, than that a man should rejoice in his own works; for that is his portion: for who shall bring him to see what shall be after him?

Bible References

Nothing

Romans 12:11
Be not backward in zeal; be fervent in spirit; serving the Lord.
Philippians 4:4
Rejoice in the Lord always; again I will say it, rejoice.

Who

Matthew 6:34
Be not then anxious about the morrow; for the morrow will be anxious about itself. Sufficient for the day is the evil thereof.