Matthew 5:36

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

Matthew 6:27

Which of you, by his anxiety, can add one span to his life?

Matthew 23:16-21

Alas for you, blind guides! who say, Whoever shall swear by the temple, it is nothing; but whoever shall swear by the gold of the temple, becomes a debtor.

Luke 12:25

"Which of you, by his anxiety, can add one span to his life?

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
Alas for you, blind guides! who say, Whoever shall swear by the temple, it is nothing; but whoever shall swear by the gold of the temple, becomes a debtor.

Because

Matthew 6:27
Which of you, by his anxiety, can add one span to his life?
Luke 12:25
"Which of you, by his anxiety, can add one span to his life?

General references

Luke 12:25
"Which of you, by his anxiety, can add one span to his life?