2 Samuel 19:14

“And he bowed the heart of all the men of Judah, even as [the heart of] one man, etc.] This the Jewish commentators generally understand of Amasa that he used his interest with the men of Judah, and so wrought upon them, that they agreed as one man to send for the king, and bring him back; but it seems best to understand it of David, who by these gentle methods, kind messages, and affectionate speeches, powerfully inclined and engaged the hearts of the people towards him; so that they were unanimously and affectionately agreed to restore him: in this way David chose to return; he could have come without their leave, or any invitation from them, as he was their lawful king, and a victorious…”

“he bowed the heart of all the men of Judah--that is, Amasa, who had been won over, used his great influence in re-attaching the whole tribe of Judah to the interest of David.”

“He bowed - David by this prudent and kind message and his free offer of pardon. 2 Kings (2 Samuel) 19:17”

“he bowed: The measures that he pursued were the best calculated that could be adopted for accomplishing this salutary end. David appears to take no notice of their infidelity, but rather to place confidence in them, that their confidence in him might be naturally excited; and to oblige them yet farther, purposes to make Amasa general of the army, instead of Joab. even: Jdg 20:1; Psa 110:2, Psa 110:3; Act 4:32 2 Kings (2 Samuel) 19:15”

“Thus he (David) inclined the heart of all the people as of one man, and they sent to the king, saying, "Return thou, with all thy servants." The result of David's message to the priests is given summarily here. The subject to ויּט is David, not Amasa or Zadok. So far as the fact itself is concerned, it was certainly wise of David to send to the members of his own tribe, and appeal to them not to be behind the rest of the tribes in taking part in his restoration to the kingdom, lest it should appear as though the tribe of Judah, to which David himself belonged, was dissatisfied with his victory, since it was in that tribe that the rebellion itself first broke out; and this would inevitably…”