John 5:31

εαν εγω μαρτυρω περι εμαυτου η μαρτυρια μου ουκ εστιν αληθης

ean egō martyrō peri emaytoy ē martyria moy oyk estin alēthēs

King James Version (KJV)

If I bear witness of myself, my witness is not true.

Modern English

“If I testify about myself, my witness is not valid.