'New Commandment' in the Bible

I give you a new commandment, that you love one another. As I have loved you, you should also love one another.

Brothers, I do not write a new commandment to you, but an old commandment which you had from the beginning. The old commandment is the Word which you have heard from the beginning.

Again, I write a new commandment to you, which thing is true in Him and in you, because the darkness is passing away, and the true Light now shines.

And now I beseech you, lady, not as though I wrote a new commandment to you, but that which we had from the beginning, that we love one another.