Proverbs 26:8
As he that bindeth a stone in a sling, so is he that giveth honour to a fool.
Cross-references
Proverbs 19:10
Parallel
Proverbs 19:10 says it's not fitting for a fool to live in luxury — reinforcing that giving honor to a fool is inappropriate.
Proverbs 30:22
Parallel
Proverbs 30:22 lists a fool full of food as an improper situation — similar to a fool receiving honor.