Matthew 5:36

neither swear by your head, because you can not make one hair white or black.

Matthew 6:27

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

Matthew 23:16-21

"Woe to you, blind guides, who say, 'Whosoever swears by the temple, it is nothing; but whosoever swears by the gold of the temple, he is a debtor!'

Luke 12:25

"And who 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, who say, 'Whosoever swears by the temple, it is nothing; but whosoever swears by the gold of the temple, he is a debtor!'

Because

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

General references

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