Matthew 5:34-36 ▼

34 But I say, do not make any vows! Do not say, ‘By heaven!’ because heaven is God’s throne.

35 And do not say, ‘By the earth!’ because the earth is his footstool. And do not say, ‘By Jerusalem!’ for Jerusalem is the city of the great King.

36 Do not even say, ‘By my head!’ for you can’t turn one hair white or black.