2 Samuel 3:25 (BSB)

Surely you realize that Abner son of Ner came to deceive you and to track your movements and all that you are doing.”

From 2 Samuel 3. Also in the ESV.

Commentary on 2 Samuel 3:25

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 2 Samuel 3:22-39: We have here an account of the murder of Abner by Joab, and David's deep resentment of it. I. Joab very insolently fell foul upon David for treating with Abner. He happened to be abroad upon service when Abner was with David, pursuing a troop, either of Philistines or of Saul's party; but, upon his return, he was informed that Abner was just gone (Sa2...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 2 Samuel 3:25: Thou knowest Abner the son of Ner,.... Thou canst not be ignorant what a cunning deceitful man he is, nor of his designs; or dost thou not know? art thou ignorant? so read the Septuagint, Vulgate Latin, Syriac, and Arabic versions, with an interrogation: that he came to deceive thee: with false hopes, or to lead into wrong measures with an intention to involve and...
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on 2 Samuel 3:6-39: 2Sa 3:6-39 Decline of the House of Saul. - 2Sa 3:6-11. Abner’s quarrel with Ishbosheth. - During the war between the house of Saul and the house of David, Abner adhered firmly to the house of Saul, but he appropriated one of Saul’s concubines to himself.