Proverbs 26:25 (BSB)

When he speaks graciously, do not believe him, for seven abominations fill his heart.

From Proverbs 26. Also in the ESV.

Commentary on Proverbs 26:25

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 26:24-26: There is cause to complain, not only of the want of sincerity in men's profession of friendship, and that they do not love so well as they pretend nor will serve their friends so much as they promise, but, which is much worse, of wicked designs in the profession of friendship, and the making of it subservient to the most malicious intentions.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 26:25: Whose hatred is covered by deceit,.... The hatred of whose heart is covered by deceitful words, and strong expressions of love and esteem; so that those to whom they are made are deceived by them. Or, whose "hatred is covered in a waste or desert place" (n); it being not seen; as what is done in desert places is not obvious to view, being little...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Proverbs 26:25: Sentiment of Pro 26:24 carried out. seven abominations in his heart--that is, very many (compare Pro 24:16).
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Proverbs 26:25: When he speaketh kindly, believe him not: for [there are] seven abominations in his heart. (l) Meaning many: he uses a certain number for the uncertain.