“Nor by the earth; for it is his footstool: neither by Jerusalem; for it is the city of the great King.”
King James Version (KJV)
5:33 Our Lord here refers to the promise made to the pure in heart of seeing God in all things, and points out a false doctrine of the scribes, which arose from their not thus seeing God. What he forbids is, the swearing at all, by any creature, in our ordinary conversation: both of which the scribes and Pharisees taught to be perfectly innocent. #Exod 20:7|.
5:36 For thou canst not make one hair white or black - Whereby it appears, that this also is not thine but God's.
5:37 Let your conversation be yea, yea; nay, nay - That is, in your common discourse, barely affirm or deny.