Matthew 5:36

nor shall you swear by your head, because you cannot make one hair white or black.

Matthew 6:27

Which of you by being anxious can add one cubit to his stature?

Matthew 23:16-21

Woe to you, blind guides, saying, Whoever shall swear by the temple, it is nothing; but whoever shall swear by the gold of the temple, he is a debtor.

Luke 12:25

And which of you by being anxious can add one cubit to his stature?

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 to you, blind guides, saying, Whoever shall swear by the temple, it is nothing; but whoever shall swear by the gold of the temple, he is a debtor.

Because

Matthew 6:27
Which of you by being anxious can add one cubit to his stature?
Luke 12:25
And which of you by being anxious can add one cubit to his stature?

General references

Luke 12:25
And which of you by being anxious can add one cubit to his stature?