Matthew 5:36

Neither swear by thy head, because thou art unable to make one hair white or black.

Matthew 6:27

And which one of you being solicitous is able to add one moment to his existence?

Matthew 23:16-21

Woe unto you, blind guides, who are saying, Whosoever may swear by the temple it is nothing; but whosoever may swear by the gold of the temple, he is debtor.

Luke 12:25

And which one of you being solicitous is able to add one moment to his existence?

Treasury of Scripture Knowledge

Summary

Neither shalt thou swear by thy head, because thou canst not make one hair white or black.

General references

Bible References

Shalt

Matthew 23:16
Woe unto you, blind guides, who are saying, Whosoever may swear by the temple it is nothing; but whosoever may swear by the gold of the temple, he is debtor.

Because

Matthew 6:27
And which one of you being solicitous is able to add one moment to his existence?
Luke 12:25
And which one of you being solicitous is able to add one moment to his existence?

General references

Luke 12:25
And which one of you being solicitous is able to add one moment to his existence?