The well Sirah - Nowhere else mentioned; according to Josephus, about two and a half miles from Hebron.

And when Joab was come out from David,.... Which perhaps he did at once, as soon as ever he had spoken his mind, and flew out of the room in a great passion, not waiting for the king's answer, since we read of none returned; though it may be the king disdained to give him one, or cared not to confer with him while in his passion, until it subsided; or chose not to provoke him more, for it is plain he had great power over him; which generals of armies at this time very much assumed, see 2 Samuel 3:39;

he sent messengers after Abner; in the name of the king, as Abarbinel rightly supposes, and so Josephus (f); for otherwise it can hardly be thought he would have returned on a message from Joab only, who he knew bore him ill will:

which brought him again from the well of Sirah; which might have its name from the thorns and briers that grew about it. Josephus (g) calls it Besira, and says it was twenty furlongs or two and an half miles from Hebron:

but David knew it not; that Joab had sent messengers in his name after Abner to fetch him back; it was not done by his order, with his consent or knowledge; this is observed, to clear David from any concern in the death of Abner, as follows.

(f) Antiqu. l. 7. c. 1. sect. 5. (g) Ibid.

For Abner had only just gone away from David, when Joab sent messengers after him, no doubt in David's name, though without his knowledge, and had him fetched back "from Bor-hasirah, i.e., the cistern of Sirah." Sirah is a place which is quite unknown to us. According to Josephus (Ant. vii. 1, 5), it was twenty stadia from Hebron, and called Βησιρά.

And when Joab was come out from David, he sent messengers after Abner, which brought him again from the well of Sirah: but David knew it not.

3:22-39 Judgments are prepared for such scorners as Abner; but Joab, in what he did, acted wickedly. David laid Abner's murder deeply to heart, and in many ways expressed his detestation of it. The guilt of blood brings a curse upon families: if men do not avenge it, God will. It is a sad thing to die like a fool, as they do that any way shorten their own days, and those who make no provision for another world. Who would be fond of power, when a man may have the name of it, and must be accountable for it, yet is hampered in the use of it? David ought to have done his duty, and then trusted God with the issue. Carnal policy spared Joab. The Son of David may long delay, but never fails to punish impenitent sinners. He who now reigns upon the throne of David, has a kingdom of a nobler kind. Whatever He doeth, is noticed by all his willing people, and is pleasing to them.