I John 3:16-17, 23

By this we know love, because He laid down His life for us. And we also ought to lay down our lives for the brethren. But whoever has this world’s goods, and sees his brother in need, and shuts up his heart from him, how does the love of God abide in him?

And this is His commandment: that we should believe on the name of His Son Jesus Christ and love one another, as He gave us commandment.