1 Thessalonians 4:9-10

9Now concerning brotherly love, you have no need for anyone to write you, for you have been [personally] taught by God to love one another [that is, to have an unselfish concern for others and to do things for their benefit].

10For indeed you already do practice it toward all the believers throughout Macedonia [by actively displaying your love and concern for them]. But we urge you, brothers and sisters, that you excel [in this matter] more and more,