Cross reference
Matthew 5:36
36 Neither shalt thou swear by thy head, because thou canst not make one hair white or black.
Luke 12:25
25 And which of you with taking thought can add to his stature one cubit?
Matthew 6:27
27 Which of you by taking thought can add one cubit unto his stature?
Matthew 23:16-21
16 Woe unto you, ye blind guides, which say, Whosoever shall swear by the temple, it is nothing; but whosoever shall swear by the gold of the temple, he is a debtor!
17 Ye fools and blind: for whether is greater, the gold, or the temple that sanctifieth the gold?
18 And, Whosoever shall swear by the altar, it is nothing; but whosoever sweareth by the gift that is upon it, he is guilty.
19 Ye fools and blind: for whether is greater, the gift, or the altar that sanctifieth the gift?
20 Whoso therefore shall swear by the altar, sweareth by it, and by all things thereon.
21 And whoso shall swear by the temple, sweareth by it, and by him that dwelleth therein.
