And David said to him, Can you bring me down to this company? And he said, Swear unto me by God, that you will neither kill me, nor deliver me into the hands of my master, and I will bring you down to this company.
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George Leo Haydock
Him. David did not require this slave to betray his master, for the latter had lost all his claim, and David had acquired it by relieving the distressed. Si herus negaverit servo suo alimenta,alius suppeditet, sit occupantis. See Martyr. and the Roman laws. The Amalecites dwelt in tents, and the slave knew where they commonly lodged. (Calmet)
Perhaps his master had told him where to meet him, in case he recovered.