John Gill's Bible Commentary Ver. 7. And it came to pass after forty years , etc.] Or four years; so long it was from the reconciliation of Absalom to David, as Josephus says; and so read Theodoret on the place, the Syriac and Arabic versions: but some say it was either forty years from the time Israel first had a king; and which might be an era of reckoning with the Jews, as the era of Seleucidae was with the Greeks, on the like account; or from the time Saul slew the priests at Nob, as Jerom f257 ; or from the time of David’s being anointed by Samuel; or this was the year of Absalom’s age, or of David’s reign: but these, and other attempts made to account for this passage, are not entirely satisfactory; and therefore one may be tempted to conclude there must be a mistake in the copy, of “arbaim” for “arba”, forty for four; which makes it quite easy, and confirms the first sense: that Absalom said unto the king, I pray thee, let me go and pay my vow , which I have vowed unto the Lord, in Hebron ; not what he vowed in Hebron; for according to his own account he had vowed it in Geshur, as in ( 2 Samuel 15:8); but his request is, that he might pay it in Hebron; which place he fixed upon, being his native place, and where David was anointed king; and which, being about twenty miles from Jerusalem, was at a proper distance to lay the scene of his conspiracy in, and bring it to perfection.
Matthew Henry Commentary
Verses 7-12 - See how willing tender parents are to believe the best concerning their children. But how easy and how wicked is it, for children to tak advantage of good parents, and to deceive them with the show of religion! The principal men of Jerusalem joined Absalom's feast upo his sacrifice. Pious persons are glad to see others appear religious and this gives occasion for deceptions. The policy of wicked men, an the subtlety of Satan, are exerted to draw good persons to countenanc base designs.
Original Hebrew ויהי1961 מקץ7093 ארבעים705 שׁנה8141 ויאמר559 אבשׁלום53 אל413 המלך4428 אלכה1980 נא4994 ואשׁלם7999 את853 נדרי5088 אשׁר834 נדרתי5087 ליהוה3068 בחברון׃2275