Matthew 6:34

Therefore, be not anxious about the morrow, for the morrow will have anxieties of its own. Sufficient for the day is its own evil.

Romans 12:11-12

in what requires diligence, be not slothful; in spirit, be fervent; in service, be devoted to the Lord;

Philippians 4:4-5

Rejoice in the Lord always; and again I say, 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
in what requires diligence, be not slothful; in spirit, be fervent; in service, be devoted to the Lord;
Philippians 4:4
Rejoice in the Lord always; and again I say, Rejoice.

Who

Matthew 6:34
Therefore, be not anxious about the morrow, for the morrow will have anxieties of its own. Sufficient for the day is its own evil.