And Judah said unto Onan, Go in unto thy brother's wife, and marry her, and raise up seed to thy brother.
-- Gen. 38:8 (KJV)
After Er died, Judah asked for Onan to carry on the lineage by marrying Tamar. When a man died in ancient times, then the next brother in line would marry the widow. Back then, that was called normal. Now, that would be called borderline incest.
Numerical Analysis: The numerical pattern for this verse is 2,8,1,3. (2) To be delivered, speak correctly to your children. (8) To have a new beginning in God, do not promote borderline incest. (1) Following God requires that you do not promote borderline incest. (3) To stay in the Spirit, do not promote borderline incest.