Proverbs 16:10 emphasizes the king's own righteous speech, while this verse highlights the king's love for others' righteous lips — complementary.

Proverbs 14:35 echoes this: a wise servant gains the king's favor, just as righteous lips delight him. Both highlight royal approval.

Proverbs 22:11 directly parallels: gracious speech wins the king as a friend, reinforcing the value of righteous lips.

Psalm 101:5-7 shows a king (David) declaring his love for truthful speech and blameless conduct — exactly the delight described here.