In 1 John 3:10, not loving your brother marks you as not of God — this grounds 3:15's claim that hatred equals murder and forfeits eternal life.

Genesis 27:41 gives a concrete example of hatred (Esau's grudge against Jacob) that matches the 'hate = murder' principle here.

Leviticus 19:16-18 explicitly forbids hating a fellow Israelite and commands love — the background for the 'hate is murder' statement here.

2 Samuel 13:22-29 shows Absalom's hatred for Amnon culminating in murder — illustrating that hatred is equivalent to murder.

In Matthew 5:21, Jesus cites the murder commandment that John internalizes to hatred.

In Matthew 5:22, Jesus equates anger with murder — the same internalization John applies to hate.

In Mark 6:19, Herodias' hatred leads to murderous intent — a narrative example of John's teaching.

In Acts 23:12, a conspiracy to kill Paul shows hatred driving murder — illustrating John's point.

In Galatians 5:21, hatred is listed among works of the flesh that bar inheritance of God's kingdom — reinforcing that hatred forfeits eternal life.

In James 4:2, desire leads to killing — directly parallels John's claim that hate is murder.

In Revelation 21:8, murderers are among those destined for the second death — confirming the fate of haters equated with murderers here.

In Zechariah 7:10, God commands not to devise evil against another — directly paralleling the prohibition of hatred that leads to murder.

In Deuteronomy 15:9, being hostile toward a poor brother is condemned as sin — reinforcing that hatred, even without murder, is grave.

In Matthew 5:28, Jesus internalizes adultery to lust — a parallel principle but about a different sin.

Ephesians 4:31 commands putting away bitterness, wrath, anger, and malice — the very attitudes that underlie hatred condemned here.

In James 1:15, desire births sin, and sin brings death — a similar progression from inner sin to death.