Proverbs 6:19 lists a false witness as one of seven things God hates — reinforcing the fate of the liar here.

Proverbs 12:19 contrasts truthful lips with a lying tongue — reinforcing that the false witness' lies are temporary while truth endures.

Proverbs 19:5 directly echoes the same warning: a false witness will not go unpunished, confirming the certainty of judgment here.

Proverbs 19:9 repeats the identical fate: a false witness will perish — a near verbatim parallel to this verse.

Proverbs 25:18 compares false witness to deadly weapons — illustrating the destructive harm that leads to the perishing here.

Proverbs 12:17 contrasts truthful and false witnesses, directly reinforcing the message of Proverbs 21:28.

Proverbs 24:28 warns against false witness, echoing the fate of the false witness in Proverbs 21:28.

Exodus 23:1 commands not to spread false reports — providing the legal backdrop for the moral warning against false witness here.

Deuteronomy 19:16-19 prescribes punishment for malicious witnesses — showing the judicial consequence that underlies the proverb's threat of perishing.

2 Samuel 16:3 records Ziba's false accusation against Mephibosheth, exemplifying the false witness who perishes.