'New Commandment' in the Bible

A new commandment I give to you, that ye love one another; as I have loved you, that ye also love one another.

Beloved, I write no new commandment to you, but an old commandment, which ye have had from the beginning. The old commandment is the word which ye heard.

Again, I write a new commandment to you, which thing is true in him and in you, because the darkness is passing and the true light already shines.

And now I beseech thee, lady, not as writing to thee a new commandment, but that which we have had from the beginning, that we should love one another.