Matthew 5v33-37

Heavenly father
give us grace to be simple and clear in what we say today.

³³ “Again you have heard that it was said to the ancient ones,
‘You shall not make false vows, but shall perform to the Lord your vows,’
³⁴ but I tell you, don’t swear at all: neither by heaven, for it is the throne of God; 
³⁵ nor by the earth, for it is the footstool of his feet; nor by Jerusalem, for it is the city of the great King.
 ³⁶ Neither shall you swear by your head, for you can’t make one hair white or black. 
³⁷ But let your ‘Yes’ be ‘Yes’ and your ‘No’ be ‘No.’ Whatever is more than these is of the evil one.