By this we know that we love the children of God, when we love God, and keep his commandments.
1 John 3:22-24
22
And whatsoever we ask we receive of Him, because we keep His commandment and do those things that are pleasing in His sight.
23
And this is His commandment: that we should believe in the name of His Son Jesus Christ and love one another, as He gave us commandment.
24
And he that keepeth His commandments dwelleth in Him, and He in him. And hereby we know that He abideth in us: by the Spirit which He hath given us.
1 John 4:21
And this commandment we have from Him: that he who loveth God love his brother also.
John 13:34
A new commandment I give unto you: that ye love one another, as I have loved you, that ye also love one another.
John 13:35
By this shall all men know that ye are My disciples: if ye have love one for another."
John 15:17
These things I command you, that ye love one another.