'New Commandment' in the Bible

"A new commandment I give to you: that you love one another--just as I have loved you, that you also love one another.

Dear friends, I am not writing a new commandment to you, but an old commandment which you have had from the beginning. The old commandment is the message which you have heard.

Again, I am writing a new commandment to you, which is true in him and in you, because the darkness is passing away and the true light already is shining.

And now I ask you, lady (not as [if I were] writing a new commandment to you, but [one] that we have had from the beginning), that we should love one another.