John 13:33-35

New Revised Standard Version, Anglicised Catholic Edition

³³ Little children, I am with you only a little longer. You will look for me; and as I said to the Jews so now I say to you, “Where I am going, you cannot come.” ³⁴ I give you a new commandment, that you love one another. Just as I have loved you, you also should love one another. ³⁵ By this everyone will know that you are my disciples, if you have love for one another.’