I have rejoiced in my enemy’s ruin: See Proverbs 24:17–18; compare 2 Samuel 16:5–8.
Speaking evil against (a curse) anyone went against the spirit of the sixth commandment (Deuteronomy 5:17; see Matthew 5:21–22).
It was against God's will to seek revenge (Matthew 5:43–44; Romans 12:14; James 3:6–10; 1 Peter 3:9).