It interested Joab to analyze the character of men and their opinions. When he heard King David's words: "Like as a father pitieth his children, so the Lord pitieth them that fear him," he expressed his astonishment that the comparison should be made with the love of a father for a child, and not with the love of a mother; mother love as a rule is considered the stronger and the more self-sacrificing.
He made up his mind to keep his eyes open, and observe whether David's idea was borne out by facts. On one of his journeys he happened into the house of a poor old man who had twelve children, all of whom the father supported, however meagrely, with the toil of his own hands. Joab proposed that he sell him one of the twelve children; he would thus be relieved of the care of one, and the selling-price could be applied to the better support of the rest.
The good father rejected the proposition brusquely. Then Joab approached the mother, offering her a hundred gold denarii for one of the children. At first she resisted the temptation, but finally she yielded. When the father returned in the evening, he cut the bread, as was his wont, into fourteen pieces, for himself, his wife, and his twelve children.
In allotting the portions he missed a child, and insisted upon being told its fate. The mother confessed what had happened during his absence. He neither ate nor drank, and next morning he set out, firmly resolved to return the money to Joab and to slay him if he should refuse to surrender the child. After much parleying, and after the father had threatened him with death, Joab yielded the child to the old man, with the exclamation: "Yes, David was right when he compared God's love for men to a father's love for his child.
This poor fellow who has twelve children to support was prepared to fight me to the death for one of them, which the mother, who calmly stayed at home, had sold to me for a price."