9 Now about your love for one another we do not need to write to you, for you yourselves have been taught by God to love each other.

Read 1 Thessalonians 4:9 Using Other Translations

But as touching brotherly love ye need not that I write unto you: for ye yourselves are taught of God to love one another.
Now concerning brotherly love you have no need for anyone to write to you, for you yourselves have been taught by God to love one another,
But we don’t need to write to you about the importance of loving each other, for God himself has taught you to love one another.