New Revised Standard Version
You sit and speak against your kin; you slander your own mother’s child.

Contemporary English Version
you sat around gossiping, ruining the reputation of your own relatives."

New American Bible
You sit and speak against your brother, slandering your mother’s son.

Douay-Rheims Bible
Sitting thou didst speak against thy brother, and didst lay a scandal against thy mother's son:

Sitting thou didst speak against thy brother, and didst lay a scandal against thy mother's son:

speakest

Psalm 31:18 Let deceitful lips be made dumb. Which speak iniquity against the just, with pride and abuse.

Matthew 5:11 Blessed are ye when they shall revile you, and persecute you, and speak all that is evil against you, untruly, for my sake:

Luke 22:65 And blaspheming, many other things they said against him.

slanderest

Leviticus 19:16 Thou shalt not be a detractor nor a whisperer among the people. Thou shalt not stand against the blood of thy neighbour. I am the Lord.

Proverbs 10:18 In the multitude of words there shall not want sin: but he that refraineth his lips, is most wise.

1 Timothy 3:11 The women in like manner: chaste, not slanderers, but sober, faithful in all things.

Titus 2:3 The aged women, in like manner, in holy attire, not false accusers, not given to much wine, teaching well:

Revelation 12:10 And I heard a loud voice in heaven, saying: Now is come salvation and strength and the kingdom of our God and the power of his Christ: because the accuser of our brethren is cast forth, who accused them before our God day and night.

thine own

Matthew 10:21 The brother also shall deliver up the brother to death, and the father the son; and the children shall rise up against their parents, and shall put them to death.