Matthew 5:34

εγω δε λεγω υμιν μη ομοσαι ολως μητε εν τω ουρανω οτι θρονος εστιν του θεου

egō de legō ymin mē omosai olōs mēte en tō oyranō oti thronos estin toy theoy

King James Version (KJV)

But I say unto you, Swear not at all; neither by heaven; for it is God's throne:

Modern English

but I tell you, don’t swear at all: neither by heaven, for it is the throne of God;