A wicked messenger falls into trouble, but a faithful envoy brings healing.
Cross References
Proverbs 25:13Like the cold of snow in the time of harvest is a trustworthy messenger to those who send him; he refreshes the soul of his masters.
Proverbs 13:18Poverty and shame come to him who ignores discipline, but whoever heeds correction is honored.
 Treasury of Scripture
A wicked messenger falls into mischief: but a faithful ambassador is health.
wicked
Proverbs 10:26
 As vinegar to the teeth, and as smoke to the eyes, so is the sluggard to them that send him.
Proverbs 26:6
 He that sendeth a message by the hand of a fool cutteth off the feet, and drinketh damage.
Jeremiah 23:13-16,28
 And I have seen folly in the prophets of Samaria; they prophesied in Baal, and caused my people Israel to err… 
but
Proverbs 25:13,23
 As the cold of snow in the time of harvest, so is a faithful messenger to them that send him: for he refresheth the soul of his masters… 
1 Corinthians 4:2
 Moreover it is required in stewards, that a man be found faithful.
2 Corinthians 5:20
 Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.