1 John 2:7-10 New Revised Standard Version (NRSV)
A New Commandment
7 Beloved, I am writing you no new commandment, but an old commandment that you have had from the beginning; the old commandment is the word that you have heard. 8 Yet I am writing you a new commandment that is true in him and in you, because[a] the darkness is passing away and the true light is already shining. 9 Whoever says, “I am in the light,” while hating a brother or sister,[b] is still in the darkness. 10 Whoever loves a brother or sister[c] lives in the light, and in such a person[d] there is no cause for stumbling.