"I give you a new commandment: love one another.  As I have loved you, so you also should love one another.  This is how all will know that you are my disciples, if you have love for one another."  (Jn 13: 34-35)
"As the Father loves me, so I also love you.  Remain in my love.  If you keep my commandments, you will remain in my love, just as I have kept my Father's commandments and remain in his love.  I have told you this so that my joy may be in you and your joy may be compete.  This is my commandment: love one another as I love you."  (Jn 15: 9-12)
"The commandments, "You shall not commit adultery; you shall not kill; you shall not steal; you shall not covet," and whatever other commandment there may  be, are summed up in this saying, "You shall love your neighbor as  yourself."  Love does no evil to the neighbor; hence, love is the fulfillment of the law."  Rom 13: 9-10)
For disciples of Christ, there is only one commandment!