The commandment of loving one another is strictly no new commandment, we find it in the law of Moses, Leviticus 19:18; often pressed in the New Testament, 1 Thessalonians 15:17 Ephesians 5:2 1 John 4:21 1 John 2:7 saith, it is no new commandment, ; see also 3 John 1:6. It is therefore called a new commandment, either because of the excellency of it, as new seemeth to be taken, Psalms 33:3 Isaiah 65:17 Matthew 26:29; or because it is expounded in the gospel in a new manner, pressed more plainly and in new arguments, and urged by a new example of their Lord and Master.
Related Commentaries of John 13:34
John 13:34
34 A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.