FIRST: Identify the sin and repent for yourself and others in your generational line...this process takes time.
SECOND: Stand firm and state clearly (so the enemy can hear) that: You have no part of, no portion, no inheritance or right or memorial - no written record to continue the pattern of ___________ which is destroying relationships in you family. (For example some patterns include: jealousy, addictions, lust, fear, anger, unforgiveness.)
Recognize that when the enemy has been caught stealing, killing and destroying relationships through ___________ (name again the sin), in your family, he is required to pay back 7 times to complete redemption and the restoration of God's intended plan for these relationships in this generation.
You can declare before God, that you require the enemy to sell his whole house (name again, the stronghold of iniquity) to accomplish this. It is finished through the cross and the blood of Jesus. Amen.
Scripture references: Nehemiah 2:20 (NKJ), Colossians 2:14 (AMP), Proverbs 6: 31(AMP), John 10:10, Psalm 33:11(NKJ), John 19:30