1 John 3:16-17, 23

Hereby know we love, because he laid down his life for us: and we ought to lay down our lives for the brethren. But whoso hath the world’s goods, and beholdeth his brother in need, and shutteth up his compassion from him, how doth the love of God abide in him?

And this is his commandment, that we should believe in the name of his Son Jesus Christ, and love one another, even as he gave us commandment.